a title used for a married couple before the surname or before the name of the husband.

(UK) Alternative form of Mr. and Mrs.

(UK) Alternative form of Mr. and Mrs.

Alternative form of Mr. and Mrs.

(UK, rail transport) Initialism of Midland Railway.

(education, special education) Initialism of mentally retarded.

Clipping of MRI. / (pharmacology, medicine) Initialism of modified release. / (cardiology) Initialism of mitral regurgitation. / (biochemistry) Initialism of mineralocorticoid receptor.

(US, Canada) Abbreviation of March (month).

(US, Canada) Abbreviation of mister. A title used before the surname in theory, though not generally in practice, above some undefined social level, too old to be addressed as “Master”, not a knight or of some higher rank, and, in Britain though not in the United States, not entitled to be addressed as “Dr.”.

Britain standard form of Mr.. Abbreviation of mister. / Britain standard form of Mr.. Abbreviation of March.