legion.
Numerous; vast; very great in number.
Meaning & usage
Numerous; vast; very great in number.
Russia’s labor and capital resources are woefully inadequate to overcome the state’s needs and vulnerabilities, which are legion.
dissatisfied customers and their legion complaints
Where this word comes from
Attested (in Middle English, as legioun) around 1200, from Old French legion, from Latin legiō, legionem, from legō (“to gather, collect”); akin to legend, lecture. Doublet of León, which was borrowed from Spanish. Generalized sense of “a large number” is due to an allusive phrase in Mark 5:9, "My name is Legion, for we are many".
The major unit or division of the Roman army, usually comprising 3000 to 6000 infantry soldiers and 100 to 200 cavalry troops.
A combined arms major military unit featuring cavalry, infantry, and artillery, including historical units such as the British Legion, and present-day units such as the Spanish Legion and the French Foreign Legion.
A large military or semi-military unit trained for combat; any military force; an army, regiment; an armed, organized and assembled militia.
A national organization or association of former servicemen, such as the American Legion.
A large number of people; a multitude.
Their complicated affairs are managed by a legion of accountants.
A great number.
A group of orders inferior to a class; in scientific classification, a term occasionally used to express an assemblage of objects intermediate between an order and a class.
Where this word comes from
Attested (in Middle English, as legioun) around 1200, from Old French legion, from Latin legiō, legionem, from legō (“to gather, collect”); akin to legend, lecture. Doublet of León, which was borrowed from Spanish. Generalized sense of “a large number” is due to an allusive phrase in Mark 5:9, "My name is Legion, for we are many".
To form into legions.
Where this word comes from
Attested (in Middle English, as legioun) around 1200, from Old French legion, from Latin legiō, legionem, from legō (“to gather, collect”); akin to legend, lecture. Doublet of León, which was borrowed from Spanish. Generalized sense of “a large number” is due to an allusive phrase in Mark 5:9, "My name is Legion, for we are many".
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.