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
Abby Montanez, Robb Report, 12 Sep. 2025
No movie poked holes in the stereotypical puffy rock-star ego more effectively than Spinal Tap did, and there are legions of fans who have the film almost completely memorized.
—Stephanie Zacharek, Time, 11 Sep. 2025
At one end, Ligue 1’s financial troubles are legion.
—James McNicholas, New York Times, 8 Sep. 2025
Like legions of dreamers before him, McGuirk started on film and TV sets as a PA, an often thankless job where random castigations from members of the cast or crew can be par for the course.
—Katie Kilkenny, HollywoodReporter, 4 Sep. 2025
See All Example Sentences for legion
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Noun
Few artists have shaped the cultural landscape like Aubrey Drake Graham—mononymously known to his legions of fans as just Drake and sometimes as Champagne Papi or Drizzy.
—Abby Montanez, Robb Report, 12 Sep. 2025
No movie poked holes in the stereotypical puffy rock-star ego more effectively than Spinal Tap did, and there are legions of fans who have the film almost completely memorized.
—Stephanie Zacharek, Time, 11 Sep. 2025
At one end, Ligue 1’s financial troubles are legion.
—James McNicholas, New York Times, 8 Sep. 2025
Like legions of dreamers before him, McGuirk started on film and TV sets as a PA, an often thankless job where random castigations from members of the cast or crew can be par for the course.
—Katie Kilkenny, HollywoodReporter, 4 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 19 Sep. 2025.
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