Definition of legion in English:


Syllabification: le·gion
Pronunciation: /ˈlējən


  • 1A unit of 3,000-6,000 men in the ancient Roman army.
    More example sentences
    • The most important fighting unit of the Roman Army was the legion commanded by a legatus.
    • Thus it was Titus who commanded the Roman legions during the famous sack of Jerusalem.
    • The Roman legions brought peace and prosperity, at least most of the time.
    brigade, regiment, battalion, company, troop, division, squadron, squad, platoon, phalanx, unit, force
  • 1.1 (the Legion) The Foreign Legion.
  • 1.2 (the Legion) Any of the national associations of former servicemen and servicewomen instituted after World War I, such as the American Legion.


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  • Great in number: her fans are legion
    More example sentences
    • Literary references to wine drinking are legion, presumably because it encouraged conversation, civilized, bawdy, or sometimes nonsensical.
    • The number of characters confronting inner demons was legion.
    • The stories about Dan are legion, and don't bear repetition here - although his autobiography is highly recommended.
    numerous, countless, innumerable, incalculable, many, abundant, plentiful
    literary myriad


Middle English: via Old French from Latin legion-, from legere 'choose, levy'. The adjective dates from the late 17th century, in early use often in the phrase my, their, etc., name is legion, i.e., 'we, they, etc., are many' (Mark 5:9).

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