The definition of m is the thirteenth letter of the English alphabet.
(noun)An example of m is the first letter in the word "martian."
See m in Webster's New World College Dictionary
or M
adjective
Origin: see M (sense )
noon: a.m., p.m.
noun
Origin: L meridies
noon: A.M., P.M.
See m in American Heritage Dictionary 4
or M
noun pl. M's m's or M's also ms or Msalso m
noun
Origin:
Origin: M, military classification
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