M, m Meaning in the Cambridge English Dictionary
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Meaning of “M, m” in the English Dictionary

"M, m" in British English

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M, mnoun

uk   us   /em/ (plural Ms, M's or m's)

M, m noun (LETTER)

[C or U] the 13th ​letter of the ​Englishalphabet

M, m noun (NUMBER)

[C] (also m) the ​sign used in the ​Romansystem for the ​number 1,000

M, m noun (ROAD)

[U] (in the UK and Ireland) abbreviation for motorway : The M4 goes from London to Bristol.

M, madjective

uk   us   /em/ (plural M's or Ms)
written abbreviation for medium adjective : used on ​clothes to show that they are of ​mediumsize
(Definition of M, m from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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