from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The major unit of the Roman army consisting of 3,000 to 6,000 infantry troops and 100 to 200 cavalry troops.
  • n. A large military unit trained for combat; an army.
  • n. A large number; a multitude. See Synonyms at multitude.
  • n. A national organization of former members of the armed forces.
  • adj. Constituting a large number; multitudinous: Her admirers were legion. His mistakes were legion.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Numerous; vast; very great in number; multitudinous.
  • n. The major unit or division of the Roman army, usually comprising 3000 to 6000 infantry soldiers and 100 to 200 cavalry troops.
  • n. A large military or semimilitary unit trained for combat; any military force; an army, regiment; an armed, organized and assembled militia.
  • n. A national organization or association of former servicemen, such as the American Legion, founded in 1919.
  • n. A large number of people; a multitude.
  • n. A great number.
  • n. 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.

from the GNU version of the Collaborative International Dictionary of English

  • n. A body of foot soldiers and cavalry consisting of different numbers at different periods, -- from about four thousand to about six thousand men, -- the cavalry being about one tenth.
  • n. A military force; an army; military bands.
  • n. A great number; a multitude.
  • n. A group of orders inferior to a class.

from The Century Dictionary and Cyclopedia

  • To enroll or form into a legion.
  • n. In Roman antiquity, a body of infantry not corresponding exactly to either the regiment or the army-corps of modern times, composed of different numbers of men at different periods, from 3,000 under the kings to over 6,000 under Marius, usually combined with a considerable proportion of cavalry.
  • n. In French history, one of numerous military bodies so called at different periods.
  • n. Any distinct military force or organization comparable to the Roman legion.
  • n. An extraordinary number; a great multitude.
  • n. In zoology, a large group or series of animals, of indeterminate taxonomic rank, but generally of high grade.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. archaic terms for army
  • n. a vast multitude
  • n. association of ex-servicemen
  • n. a large military unit
  • adj. amounting to a large indefinite number


Middle English legioun, from Old French legion, from Latin legiō, legiōn-, from legere, to gather; see leg- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Attested (in Middle English, as legioun) around 1200, from Old French legion, from Latin legiō, legionem, from legere ("to gather, collect"); akin to legend, lecture. (Wiktionary)



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