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
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 Web
Jon Coupal, Oc Register, 19 Sep. 2025
For not all of the world’s legions of undead are nocturnal blood-predators with fangs.
—Matthew Wills, JSTOR Daily, 16 Sep. 2025
Redford was suddenly a bankable leading man with his pick of projects — and legions of admirers across the country.
—Daniel Arkin, NBC news, 16 Sep. 2025
John Goldberger to legions of horology aficionados who follow him online) that caught the attention of the Financial Times and had social media buzzing.
—Naomi Rougeau, Robb Report, 13 Sep. 2025
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Noun
Examples of wasteful spending are legion, but here are three examples that immediately caught our attention.
—Jon Coupal, Oc Register, 19 Sep. 2025
For not all of the world’s legions of undead are nocturnal blood-predators with fangs.
—Matthew Wills, JSTOR Daily, 16 Sep. 2025
Redford was suddenly a bankable leading man with his pick of projects — and legions of admirers across the country.
—Daniel Arkin, NBC news, 16 Sep. 2025
John Goldberger to legions of horology aficionados who follow him online) that caught the attention of the Financial Times and had social media buzzing.
—Naomi Rougeau, Robb Report, 13 Sep. 2025
See All Example Sentences for legion
Cite this Entry
“Legion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/legion. Accessed 21 Sep. 2025.
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