m.

1. abbreviationgrammarAbbreviation of masculine.

   Synonyms: m

2. abbreviationchiefly genealogyAbbreviation of married.
3. abbreviationAbbreviation of minimum.

plural ms.

1. alternativeAlternative form of m (abbreviation of mile, etc.)

   Clunbury, a hamlet and chapelry to the par. of the same name, hund. of Purslow, Salop. 5 m. from Bishop's Castle, and 153 from London; cont. 63 ho. and 359 inhab.

   1825, Benjamin Pitts Capper, A Topographical Dictionary of the United Kingdom, page 217

plural Messrs. · plural MM.

1. alternativeAlternative form of M (“Monsieur”).

   Hérodiade, opera, in four acts, libretto by MM. Paul Milliet and Gremont, music by M. Jules Massenet, February 1.

   1885, The Era Almanack and Annual, page 79

   2 more examples

   The next morning I delivered my letters of introduction, and paid a visit to some of the principal professors, and among others to M. Krempe, professor of natural philosophy.

   1816 June – 1817 April/May (date written), [Mary Shelley], chapter II, in Frankenstein; or, The Modern Prometheus. […], volume I, London: […] [Macdonald and Son] for Lackington, Hughes, Harding, Mavor, & Jones, published 1 January 1818, →OCLC, page 69

   We may also mention the work of Capt. Onatsévich [translating Онацевич (Onacevič)] on the shores of Russian Manchooria (NATURE, vol. xv. p. 417), and the important cartographical work of M. Sidensner [translating Сиденснер (Sidensner)] between the Obi and Jenissei rivers.

   1877 July 12, “Geographical Work in Russia During 1876”, in Nature, →ISSN, →OCLC, page 209, column 1

1. rareA gender-neutral honorific, comparable to Mx., used instead of Mr., Mrs., etc.

   I like the idea of just "M. Smith". Who cares whether the person is male or female if the matters under discussion are just business? If this is confusable with "Malcolm Smith" or "Marylin Smith", why not use "Mx. Smith" instead. […]

   1983 September 27, Martin Taylor, Miss/Mrs/Ms, net.women

   1 more example

   while we're at it, let's get rid of all this Miss/Mrs/Mr/Ms crap. It wasn't much of a step to go from Miss/Mrs to Ms; after all, the issue should be that gender is unimportant. How about one generic title for everyone? For instance, M. Smith, M. Jones. […]

   1982 July 10, Mx. John Eldridge (username "floyd!jce"), More words and sex, net.nlang

1. abbreviationAbbreviation of model.