1
: the principal unit of the Roman army comprising 3000 to 6000 foot soldiers with cavalry
Caesar and his legions defeated the Gauls.
2
: a large military force
3
: a very large number : multitude
won him … a legion of devoted followers—
Irving Kolodin
Irving Kolodin4
: a national association of ex-servicemen
the American Legion
Synonyms
Examples of legion in a Sentence
Noun
Legions of people came to see him perform.
joined the French Foreign Legion
Adjective
the obstacles that the programmers had to overcome have been legion
Recent Examples on the WebFrank Scheck, The Hollywood Reporter, 26 Apr. 2024
Their interest helps drive the popularity of different clubs and leagues, bringing legions of supporters to stadiums and motivating players.
—Prarthana Prakash, Fortune Europe, 20 Apr. 2024
See all Example Sentences for legion 
Noun
Trump’s biggest complaint was with the high level of security that prevented his legions of followers from showing up and protesting.
—Frank Scheck, The Hollywood Reporter, 26 Apr. 2024
Their interest helps drive the popularity of different clubs and leagues, bringing legions of supporters to stadiums and motivating players.
—Prarthana Prakash, Fortune Europe, 20 Apr. 2024
See all Example Sentences for legion
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'legion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near legion
Cite this Entry
“Legion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/legion. Accessed 4 May. 2024.
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