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
Jacob Jones, JSTOR Daily, 13 Aug. 2025
That’s a testament to Berg’s filmmaking skill and to the legions of devoted Jeff Buckley fans, who feel passionately about the singer-songwriter’s music almost 30 years after his untimely passing.
—Matthew Carey, Deadline, 12 Aug. 2025
From there the Legionella can get into your lungs and give you Legionnaire’s disease, which could bring a legion of problems.
—Bruce Y. Lee, Forbes.com, 6 Aug. 2025
Other legion members gave similarly positive reactions to Buckley’s and others’ responses, and Lovell staff stayed after the town hall with several members to help with their concerns.
—Joseph States, Chicago Tribune, 5 Aug. 2025
See All Example Sentences for legion
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Noun
Still, the Jews chafed under Roman rule and finally rebelled in 66 CE, a revolt which invited the wrath of the Roman legions led by future emperors Vespasian and his son Titus.
—Jacob Jones, JSTOR Daily, 13 Aug. 2025
That’s a testament to Berg’s filmmaking skill and to the legions of devoted Jeff Buckley fans, who feel passionately about the singer-songwriter’s music almost 30 years after his untimely passing.
—Matthew Carey, Deadline, 12 Aug. 2025
From there the Legionella can get into your lungs and give you Legionnaire’s disease, which could bring a legion of problems.
—Bruce Y. Lee, Forbes.com, 6 Aug. 2025
Other legion members gave similarly positive reactions to Buckley’s and others’ responses, and Lovell staff stayed after the town hall with several members to help with their concerns.
—Joseph States, Chicago Tribune, 5 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 22 Aug. 2025.
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