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
Katie Kilkenny, HollywoodReporter, 4 Sep. 2025
The fifth-generation Toyota Supra is, in large part, a BMW, but that didn’t make its comeback any less special for its fans, who are legion.
—Erik Shilling, Robb Report, 4 Sep. 2025
Joining the legion of polka dot devotees—Bella Hadid is chief among them—her fellow super Kaia Gerber went for a butter yellow halterneck top from cool girl fave With Jéan for her arrival at the 2025 Venice Film Festival, adding a Gucci Jackie bag in one arm and Lewis Pullman on the other.
—Olivia Allen, Vogue, 1 Sep. 2025
Her fans, the Swifties, are legion.
—Miami Herald, 29 Aug. 2025
See All Example Sentences for legion
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Noun
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
The fifth-generation Toyota Supra is, in large part, a BMW, but that didn’t make its comeback any less special for its fans, who are legion.
—Erik Shilling, Robb Report, 4 Sep. 2025
Joining the legion of polka dot devotees—Bella Hadid is chief among them—her fellow super Kaia Gerber went for a butter yellow halterneck top from cool girl fave With Jéan for her arrival at the 2025 Venice Film Festival, adding a Gucci Jackie bag in one arm and Lewis Pullman on the other.
—Olivia Allen, Vogue, 1 Sep. 2025
Her fans, the Swifties, are legion.
—Miami Herald, 29 Aug. 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 11 Sep. 2025.
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