← Latin for Soldiers, Sailors and Military Strategists
The adjective māgnus -a -um means "great, large, big, important" and is one of the most fundamental descriptive words in Latin military vocabulary. As a first and second declension adjective, it follows the same pattern as bonus -a -um, matching the gender, number, and case of the noun it modifies. In military contexts, māgnus frequently describes the scale of battles, the importance of victories, the size of armies, and the magnitude of military undertakings.
Question: What does māgnus mean in Latin? Answer: Māgnus -a -um is a Latin adjective meaning "great, large, big, important, or significant." It is a first and second declension adjective that must agree with the noun it modifies in gender, number, and case.
In this lesson, māgnus will appear in various military contexts: describing great battles (māgna proelia), large armies (māgnī exercitūs), important victories (māgnae victōriae), and significant military leaders (māgnī ducēs). The examples will demonstrate how this adjective changes its endings to agree with different nouns and how Roman military writers used it to convey the scope and importance of military operations.
Course: Latin for Soldiers, Sailors and Military Strategists Level: Beginner to Intermediate Lesson Number: 25 Topic: First and Second Declension Adjective - māgnus -a -um Learning Objectives: Students will learn to recognize, decline, and use the adjective māgnus in military contexts
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Māgnus -a -um is a regular 1st/2nd declension adjective meaning "great" -
It must agree with its noun in gender, number, and case -
The masculine nominative singular is māgnus, feminine māgna, neuter māgnum -
In military Latin, it frequently describes battles, armies, victories, and leaders -
Word order is flexible - māgnus can come before or after its noun for emphasis
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25.1 Māgnus great exercitus army ad to urbem city venit comes
25.2 Dux leader māgnam great victōriam victory reportat brings back
25.3 In in bellō war māgnō great mīlitēs soldiers fortiter bravely pugnant fight
25.4 Nāvēs ships māgnae great per through mare sea nāvigant sail
25.5 Hostēs enemies māgnīs with great cōpiīs forces oppidum town oppugnant attack
25.6 Castra camp māgna great lēgātus lieutenant in on colle hill pōnit places
25.7 Cum with māgnā great glōriā glory imperātor general redit returns
25.8 Māgnī great ducēs leaders cōnsilium plan bellī of war capiunt make
25.9 Proelium battle māgnum great prīmā at first lūce light committitur is joined
25.10 Ad to portum harbor māgnum great classis fleet pervenit arrives
25.11 Māgnō with great labōre effort mīlitēs soldiers fossam ditch fodiunt dig
25.12 Victōria victory māgna great populō to people Rōmānō Roman gaudium joy affert brings
25.13 Ex from māgnīs great perīculīs dangers legiō legion servātur is saved
25.14 Māgnārum of great nāvium ships numerus number in in portū harbor est is
25.15 Centuriō centurion māgnae of great virtūtis courage mīlitēs soldiers dūcit leads
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25.1 Māgnus exercitus ad urbem venit. A great army comes to the city.
25.2 Dux māgnam victōriam reportat. The leader brings back a great victory.
25.3 In bellō māgnō mīlitēs fortiter pugnant. In a great war the soldiers fight bravely.
25.4 Nāvēs māgnae per mare nāvigant. Great ships sail through the sea.
25.5 Hostēs māgnīs cōpiīs oppidum oppugnant. The enemies attack the town with great forces.
25.6 Castra māgna lēgātus in colle pōnit. The lieutenant places a great camp on the hill.
25.7 Cum māgnā glōriā imperātor redit. The general returns with great glory.
25.8 Māgnī ducēs cōnsilium bellī capiunt. Great leaders make a plan of war.
25.9 Proelium māgnum prīmā lūce committitur. A great battle is joined at first light.
25.10 Ad portum māgnum classis pervenit. The fleet arrives at a great harbor.
25.11 Māgnō labōre mīlitēs fossam fodiunt. With great effort the soldiers dig a ditch.
25.12 Victōria māgna populō Rōmānō gaudium affert. A great victory brings joy to the Roman people.
25.13 Ex māgnīs perīculīs legiō servātur. The legion is saved from great dangers.
25.14 Māgnārum nāvium numerus in portū est. A number of great ships is in the harbor.
25.15 Centuriō māgnae virtūtis mīlitēs dūcit. A centurion of great courage leads the soldiers.
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25.1 Māgnus exercitus ad urbem venit.
25.2 Dux māgnam victōriam reportat.
25.3 In bellō māgnō mīlitēs fortiter pugnant.
25.4 Nāvēs māgnae per mare nāvigant.
25.5 Hostēs māgnīs cōpiīs oppidum oppugnant.
25.6 Castra māgna lēgātus in colle pōnit.
25.7 Cum māgnā glōriā imperātor redit.
25.8 Māgnī ducēs cōnsilium bellī capiunt.
25.9 Proelium māgnum prīmā lūce committitur.
25.10 Ad portum māgnum classis pervenit.
25.11 Māgnō labōre mīlitēs fossam fodiunt.
25.12 Victōria māgna populō Rōmānō gaudium affert.
25.13 Ex māgnīs perīculīs legiō servātur.
25.14 Māgnārum nāvium numerus in portū est.
25.15 Centuriō māgnae virtūtis mīlitēs dūcit.
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The adjective māgnus -a -um follows the standard pattern of first and second declension adjectives in Latin. This means: -
Masculine forms follow the second declension (like dominus) -
Feminine forms follow the first declension (like puella) -
Neuter forms follow the second declension neuter pattern (like bellum)
Masculine Singular: māgnus, māgnī, māgnō, māgnum, māgnō Masculine Plural: māgnī, māgnōrum, māgnīs, māgnōs, māgnīs
Feminine Singular: māgna, māgnae, māgnae, māgnam, māgnā Feminine Plural: māgnae, māgnārum, māgnīs, māgnās, māgnīs
Neuter Singular: māgnum, māgnī, māgnō, māgnum, māgnō Neuter Plural: māgna, māgnōrum, māgnīs, māgna, māgnīs
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Agreement: Unlike English, where "great" never changes form, Latin māgnus must change its ending to match the gender, number, and case of the noun it modifies. -
Position: While English typically places adjectives before nouns ("great army"), Latin can place māgnus either before or after the noun. Position often indicates emphasis: -
māgnus exercitus = a great army (normal description) -
exercitus māgnus = an army that is great (emphasizing the greatness) -
Special Uses: Māgnus can be used with the ablative to mean "at great (cost/effort/etc.)": -
māgnō labōre = with great effort -
māgnō pretiō = at a great price
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Forgetting Agreement: Students often use māgnus with feminine or neuter nouns. Remember: -
māgna victōria (NOT māgnus victōria) -
māgnum proelium (NOT māgnus proelium) -
Confusing Similar Endings: The genitive singular feminine (māgnae) looks like the nominative plural feminine (māgnae). Context determines which is meant. -
Ablative of Price/Manner: When māgnus appears in the ablative without a preposition, it often expresses manner or price, not location.
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Identify the noun māgnus will modify -
Determine that noun's gender (masculine, feminine, or neuter) -
Determine that noun's number (singular or plural) -
Determine that noun's case (nominative, genitive, etc.) -
Give māgnus the ending that matches all three characteristics
Example: "great victories" (direct object) -
victōria is feminine -
We want plural -
Direct object = accusative case -
Result: māgnās victōriās
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For Romans, the concept of māgnus extended far beyond mere physical size. In military contexts, māgnus carried connotations of importance, nobility, and historical significance. A māgnum proelium was not just a large battle but a decisive engagement that would be remembered by history. Similarly, a māgnus dux was not merely a commander of many troops but a leader whose actions would shape the fate of Rome.
The Roman military mind categorized conflicts by their magnitude. Small skirmishes (leve proelium) were distinguished from great battles (māgnum proelium), and this distinction affected how they were recorded, commemorated, and rewarded. Triumph ceremonies were reserved for victories in māgna bella, while smaller successes might merit only an ovation.
Roman military engineering also embodied the concept of māgnus. The great camps (castra māgna) of the legions were marvels of organization, capable of housing thousands of soldiers with standardized layouts that could be reproduced anywhere in the empire. The great military roads (viae māgnae) like the Via Appia served both strategic and symbolic purposes, demonstrating Roman power through their scale and permanence.
Naval warfare particularly showcased Roman appreciation for māgnus. After initially being a land-based power, Rome developed great fleets (classes māgnae) that could project power across the Mediterranean. The construction of these māgnae nāvēs represented a massive investment of resources and a transformation of Roman military capability.
The phrase māgnō cum labōre (with great effort) appears frequently in military accounts, acknowledging that Roman victories were not easily won but required tremendous sacrifice and determination. This cultural value of recognizing the cost of achievement permeated Roman military thinking and helped maintain morale during difficult campaigns.
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From Caesar's Commentarii de Bello Gallico, Book I, Chapter 2:
"Apud Helvētiōs longē nōbilissimus fuit et dītissimus Orgetorīx. Is M. Messālā et M. Pīsōne cōnsulibus rēgnī cupiditāte inductus coniūrātiōnem nōbilitātis fēcit et cīvitātī persuāsit ut dē fīnibus suīs cum omnibus cōpiīs exīrent: perfacile esse, cum virtūte omnibus praestārent, tōtīus Galliae imperiō potīrī."
Apud among Helvētiōs the Helvetii longē by far nōbilissimus most noble fuit was et and dītissimus wealthiest Orgetorīx Orgetorix. Is He M. Marcus Messālā Messala et and M. Marcus Pīsōne Piso cōnsulibus being consuls rēgnī of royal power cupiditāte by desire inductus influenced coniūrātiōnem conspiracy nōbilitātis of the nobility fēcit made et and cīvitātī to the state persuāsit persuaded ut that dē from fīnibus territories suīs their own cum with omnibus all cōpiīs forces exīrent they should go out: perfacile very easy esse to be, cum since virtūte in courage omnibus all praestārent they excelled, tōtīus of all Galliae Gaul imperiō the command potīrī to gain control of.
Apud Helvētiōs longē nōbilissimus fuit et dītissimus Orgetorīx. Is M. Messālā et M. Pīsōne cōnsulibus rēgnī cupiditāte inductus coniūrātiōnem nōbilitātis fēcit et cīvitātī persuāsit ut dē fīnibus suīs cum omnibus cōpiīs exīrent: perfacile esse, cum virtūte omnibus praestārent, tōtīus Galliae imperiō potīrī.
Among the Helvetii, Orgetorix was by far the most noble and wealthy. He, influenced by a desire for royal power when Marcus Messala and Marcus Piso were consuls, made a conspiracy of the nobility and persuaded the state that they should depart from their territories with all their forces: that it would be very easy, since they excelled all in courage, to gain control of the command of all Gaul.
Apud Helvētiōs longē nōbilissimus fuit et dītissimus Orgetorīx. Is M. Messālā et M. Pīsōne cōnsulibus rēgnī cupiditāte inductus coniūrātiōnem nōbilitātis fēcit et cīvitātī persuāsit ut dē fīnibus suīs cum omnibus cōpiīs exīrent: perfacile esse, cum virtūte omnibus praestārent, tōtīus Galliae imperiō potīrī.
This passage, though not containing māgnus directly, illustrates the Roman concept of greatness through superlatives (nōbilissimus, dītissimus) and the idea of total military force (omnibus cōpiīs). Key grammatical features include: -
Superlative Adjectives: nōbilissimus and dītissimus show the highest degree, conceptually related to māgnus -
Ablative Absolute: M. Messālā et M. Pīsōne cōnsulibus provides temporal context -
Purpose Clause: ut...exīrent shows intended action -
Indirect Statement: perfacile esse...potīrī reports Orgetorix's argument -
Military Vocabulary: cōpiīs (forces), imperiō (command) demonstrate military context
The passage exemplifies how Romans conceived of military greatness - not just in numbers (omnibus cōpiīs) but in excellence (virtūte praestārent) and ambition (tōtīus Galliae imperiō).
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This passage describes a Roman military victory and its aftermath. Here's the narrative arc:
Battle Setup (25.16-25.17) - A great leader (Prīma/Dux) leads an army from camp - Enemy forces are arrayed on the plain
The Battle (25.18-25.23) - Romans attack with great shout - Fierce, long combat (many hours) - Centurions show courage - Cavalry surrounds from the right wing - Great slaughter on both sides - Finally, enemies are routed with great disaster
Victory Aftermath (25.24-25.30) - Romans seize great booty from enemy camp - General seeks a triumph from the Senate - The leader's name is celebrated among all nations - Lasting peace follows the war - A great monument is erected in the forum - The memory of great deeds remains with posterity - Legions return to winter quarters with great praise
- Anaphora: "Māgnus/māgna/māgnae/māgni" (great) appears in nearly every sentence—emphasizing the scale and significance of events - Military vocabulary: Standard terms for tactics (impetus, cornū, acies) - Narrative progression: Moves chronologically from battle through celebration to commemoration - Didactic purpose: Illustrates Roman military values and the immortal glory of victory ✾ ❦ ✾ ❦ ✾ ✾ ❦ ✾ ❦ ✾ ✾ ❦ ✾ ❦ ✾
25.16 Prīmā lūce dux māgnus exercitum ex castrīs ēdūcit. At first light the great leader leads the army out from camp.
25.17 Hostium cōpiae māgnae in plānitiē īnstruuntur. The enemies' great forces are drawn up in the plain.
25.18 Māgnō clāmōre mīlitēs Rōmānī in hostēs impetum faciunt. With a great shout the Roman soldiers make an attack against the enemies.
25.19 Proelium māgnum et atrōx multās hōrās dūrat. The great and fierce battle lasts many hours.
25.20 Centuriōnēs māgnae virtūtis prīmī in aciēm ruunt. Centurions of great courage rush first into the battle line.
25.21 Ā dextrō cornū equitēs māgnīs vīribus circumveniunt. From the right wing the cavalry surround with great forces.
25.22 Māgna caedēs utrimque fit. Great slaughter happens on both sides.
25.23 Tandem hostēs māgnā clade acceptā terga vertunt. Finally the enemies, having received a great disaster, turn their backs.
25.24 Victōrēs māgnam praedam ex hostium castrīs rapiunt. The victors seize great booty from the enemies' camp.
25.25 Imperātor ob victōriam māgnam triumphum ā senātū petit. The general seeks a triumph from the senate on account of the great victory.
25.26 Māgnī ducis nōmen per omnēs gentēs celebrātur. The name of the great leader is celebrated through all nations.
25.27 Post bellum māgnum pāx diūturna sequitur. After the great war a lasting peace follows.
25.28 Monumentum māgnum in forō victōribus statuitur. A great monument is set up in the forum for the victors.
25.29 Māgnārum rērum memoria semper apud posterōs manet. The memory of great deeds always remains among descendants.
25.30 Sīc māgnā cum laude legiōnēs ad hīberna redeunt. Thus with great praise the legions return to winter quarters.
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25.16 Prīmā lūce dux māgnus exercitum ex castrīs ēdūcit.
25.17 Hostium cōpiae māgnae in plānitiē īnstruuntur.
25.18 Māgnō clāmōre mīlitēs Rōmānī in hostēs impetum faciunt.
25.19 Proelium māgnum et atrōx multās hōrās dūrat.
25.20 Centuriōnēs māgnae virtūtis prīmī in aciēm ruunt.
25.21 Ā dextrō cornū equitēs māgnīs vīribus circumveniunt.
25.22 Māgna caedēs utrimque fit.
25.23 Tandem hostēs māgnā clade acceptā terga vertunt.
25.24 Victōrēs māgnam praedam ex hostium castrīs rapiunt.
25.25 Imperātor ob victōriam māgnam triumphum ā senātū petit.
25.26 Māgnī ducis nōmen per omnēs gentēs celebrātur.
25.27 Post bellum māgnum pāx diūturna sequitur.
25.28 Monumentum māgnum in forō victōribus statuitur.
25.29 Māgnārum rērum memoria semper apud posterōs manet.
25.30 Sīc māgnā cum laude legiōnēs ad hīberna redeunt.
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This epic battle narrative demonstrates advanced uses of māgnus in military contexts:
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Attributive Position (directly modifying a noun): -
dux māgnus (25.16) - following the noun for emphasis -
cōpiae māgnae (25.17) - following the noun -
māgnam praedam (25.24) - preceding the noun -
Genitive of Quality (describing a characteristic): -
centuriōnēs māgnae virtūtis (25.20) - "centurions of great courage" -
māgnī ducis nōmen (25.26) - "the name of a great leader" -
māgnārum rērum memoria (25.29) - "memory of great deeds" -
Ablative of Manner (describing how something is done): -
māgnō clāmōre (25.18) - "with a great shout" -
māgnīs vīribus (25.21) - "with great forces" -
māgnā cum laude (25.30) - "with great praise"
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Ablative Absolute: māgnā clade acceptā (25.23) - "a great disaster having been received" -
Prepositional Phrases: ob victōriam māgnam (25.25) - "on account of the great victory" -
Passive Voice: Several verbs appear in passive form to focus on the action rather than the actor: -
īnstruuntur (are drawn up) -
celebrātur (is celebrated) -
statuitur (is set up)
Notice how word order creates different emphases: -
proelium māgnum et atrōx (25.19) - māgnum is sandwiched between noun and another adjective -
post bellum māgnum (25.27) - māgnum concludes the phrase for emphasis -
monumentum māgnum (25.28) - straightforward description
These variations show how Latin writers achieved stylistic variety while maintaining clarity in their military narratives.
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The Latin Reading Course at the Latinum Institute represents a unique approach to learning Latin through extensive reading and contextual understanding. Created by Evan der Millner BA MA (Cantab. NZ, London), who has been developing online language learning materials since 2006, these lessons are specifically designed for autodidacts who wish to master Latin independently.
The course follows the principles outlined at latinum.substack.com and latinum.org.uk, emphasizing: -
Comprehensible Input: Each lesson provides carefully graded Latin text with extensive support -
Construed Text Method: Part A breaks down sentences word-by-word, allowing beginners to see exact correspondences between Latin and English 25.16 Prīmā at first lūce light dux leader māgnus great exercitum army ex from castrīs camp ēdūcit leads out
25.17 Hostium of enemies cōpiae forces māgnae great in in plānitiē plain īnstruuntur are drawn up
25.18 Māgnō with great clāmōre shout mīlitēs soldiers Rōmānī Roman in against hostēs enemies impetum attack faciunt make
25.19 Proelium battle māgnum great et and atrōx fierce multās many hōrās hours dūrat lasts
25.20 Centuriōnēs centurions māgnae of great virtūtis courage prīmī first in into aciēm battle line ruunt rush
25.21 Ā from dextrō right cornū wing equitēs cavalry māgnīs with great vīribus forces circumveniunt surround
25.22 Māgna great caedēs slaughter utrimque on both sides fit happens
25.23 Tandem finally hostēs enemies māgnā with great clade disaster acceptā received terga backs vertunt turn
25.24 Victōrēs victors māgnam great praedam booty ex from hostium enemies' castrīs camp rapiunt seize
25.25 Imperātor general ob on account of victōriam victory māgnam great triumphum triumph ā from senātū senate petit seeks
25.26 Māgnī great ducis of leader nōmen name per through omnēs all gentēs nations celebrātur is celebrated
25.27 Post after bellum war māgnum great pāx peace diūturna lasting sequitur follows
25.28 Monumentum monument māgnum great in in forō forum victōribus to victors statuitur is set up
25.29 Māgnārum of great rērum deeds memoria memory semper always apud among posterōs descendants manet remains
25.30 Sīc thus māgnā with great cum with laude praise legiōnēs legions ad to hīberna winter quarters redeunt return
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