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
Billy Perrigo, Time, 24 Feb. 2026
Jalisco operatives have aggressively invaded the turf of other gangs, incorporated smaller criminal bands into its ranks and put legions of police officers, judges, prosecutors and politicians on its payroll.
—Kate Linthicum, Los Angeles Times, 23 Feb. 2026
The strike prompted the hospitals to hire legions of temporary nurses to fill in staffing gaps during a demanding flu season, raising concerns among some of the hospital system’s most vulnerable patients and their families.
—Philip Marcelo, Fortune, 20 Feb. 2026
Simone Biles, Demi Lovato, Lady Gaga, Naomi Osaka, and Chappell Roan are among the legions of recognisable names who haven’t struggled in silence.
—Beth Ann Mayer, Parents, 20 Feb. 2026
See All Example Sentences for legion
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Noun
Its Claude models, especially the software-writing tool Claude Code, have won legions of devoted fans.
—Billy Perrigo, Time, 24 Feb. 2026
Jalisco operatives have aggressively invaded the turf of other gangs, incorporated smaller criminal bands into its ranks and put legions of police officers, judges, prosecutors and politicians on its payroll.
—Kate Linthicum, Los Angeles Times, 23 Feb. 2026
The strike prompted the hospitals to hire legions of temporary nurses to fill in staffing gaps during a demanding flu season, raising concerns among some of the hospital system’s most vulnerable patients and their families.
—Philip Marcelo, Fortune, 20 Feb. 2026
Simone Biles, Demi Lovato, Lady Gaga, Naomi Osaka, and Chappell Roan are among the legions of recognisable names who haven’t struggled in silence.
—Beth Ann Mayer, Parents, 20 Feb. 2026
See All Example Sentences for legion
Cite this Entry
“Legion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/legion. Accessed 28 Feb. 2026.
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