大群|たいぐんtaigun[0]heiban (flat)

1. nounlarge crowd; large herd; large flock; large school; large shoal; large swarm; horde
   イナゴが大群たいぐんをなしてやってきた。↗

   Locusts came in big swarms.

• Synonym群衆ぐんしゅうNeutralA large crowd of people gathered in one place; only for people, whereas 「大群」 usually describes animals. Neutral register.
• Synonym群集ぐんしゅうWrittenGathering or flocking together; also used as a biology term. 「大群」 stresses sheer numbers. Written/formal register.
• Synonym人だかりひとだかりCasualA crowd of onlookers pressing around, as in 「事故現場に人だかり」; 「大群」 usually describes animals. Colloquial.
• Related大勢おおぜいNeutralGreat numbers of people only, as in 「大勢の人」; 「大群」 usually describes animals. Neutral register.
• Related集まりあつまりNeutralA gathering or meeting, or the people and things that gather; 「大群」 instead stresses a group that forms a flock, herd or swarm. Neutral register.
• Related一団いちだんNeutralA body or party of people, as in 「観光客の一団」; the group need not be large. Neutral register.
• Related多勢たぜいWrittenGreat numbers of people, seen mostly in 「多勢に無勢」; 「大群」 usually describes animals. Written/formal register.
• RelatedグループNeutralLoanword for a group, team or small circle of people; 「大群」 means a massive swarm or herd. Neutral register.
• Related群がりむらがりCasualPeople or things clustering into a mass; not often used. 「大群」 emphasizes large scale. Colloquial.
• Related一群れひとむれNeutralA flock, bunch or cluster of similar things, whatever its size; 「大群」 stresses huge numbers. Neutral register.
• Related烏合の衆うごうのしゅうWrittenA disorderly, undisciplined rabble — derogatory, where 「大群」 is neutral. Written/formal register.
• Related人立ちひとだちWrittenA crowd of people gathered around to watch; rare — 「人だかり」 is the usual word. Written/formal register.
• RelatedモブCasualLoanword for a mob or crowd, and for background characters in manga and games; a different use from 「大群」. Colloquial.
• Antonym小群WrittenA small group or flock; the direct opposite of 「大群」, and itself rarely used. Written/formal register.

Use 「大群」 for a huge group of animals or insects, as in 「イナゴの大群」. For large numbers of people say 「大勢」; for a crowd gathered in one place, 「群衆」; for onlookers pressing around a scene, 「人だかり」. Most other words here name smaller or more specific groupings.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 動物どうぶつなどの大おおきな群むれ。