Definition of legion
- Caesar and his legions defeated the Gauls.
- the French Foreign Legion
- won him … a legion of devoted followers
- —Irving Kolodin
- the American Legion
Legions of people came to see him perform.
joined the French Foreign Legion
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'legion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
the obstacles that the programmers had to overcome have been legion
: very many or numerous
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