M.

noun

1. 1

   Variant of MAlternative form of M (“Monsieur”).

   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.

   [object Object]

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

noun

1. 1

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

   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. […]

   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. […]

noun

1. 1

   Variant of modelAbbreviation of model.

Forms

plural

Messrs., MM.