Definition of mR

 (Entry 1 of 2)



\ ˈmi-stər How to pronounce Mr. (audio) , in rapid speech especially in sense 2 (ˌ)mis(t) \
variants: US Mr. or British Mr
plural Messrs.\ ˈme-​sərz How to pronounce Mr. (audio) \

Definition of Mr. (Entry 2 of 2)

1 used as a conventional title of courtesy except when usage requires the substitution of a title of rank or an honorific or professional title before a man's surnamespoke to Mr. Doe
2 used in direct address as a conventional title of respect before a man's title of officeMay I ask one more question, Mr. President?
3 used before the name of a place, profession, or activity or before an epithet (such as clever) to form a title applied to a male viewed as representative of the thing indicatedMr. Baseball

Frequently Asked Questions About mR

What is the plural of Mr.?

The plural of Mr. is Messrs. There is a reason for this seemingly incongruous change: were one to simply add an s to the end of Mr. it would be indistinguishable from the honorific for a married woman, and so the plural is made by shortening the plural form of the French word for Misters (Messieurs).

What is the plural of Mrs.?

The plural of Mrs. is Mmes., a shortening of the French plural Mesdames. English borrowed the French plural for this honorific after adopting Messrs. for the plural of Mr.. This was done because it would have been difficult to otherwise distinguish Mr. from Mrs. had we formed the plural by simply adding an s to it.

How do you pluralize Ms. and Miss?

Miss (an unmarried woman or girl) is pluralized as Misses. Ms. (a women for whom the marital status is either unknown or irrelevant) may be pluralized as either Mss. or Mses.

First Known Use of mR


15th century, in the meaning defined at sense 1

History and Etymology for mR


Mr. from Middle English, abbreviation of maister master; Messrs. abbreviation of Messieurs, from French, plural of Monsieur

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The first known use of mR was in the 15th century

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Cite this Entry

“MR.” Dictionary, Merriam-Webster, Accessed 21 Jan. 2021.

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More Definitions for mR


How to pronounce Mr. (audio)

English Language Learners Definition of Mr.

used as a title when speaking to a man who has an honored position or office
used as part of a title for a man who has won a contest
used to refer to a man who is very successful and famous for a particular activity (such as a sport) or who has a particular quality


\ ˈmi-stər \
plural Messrs.\ ˈme-​sərz \

Kids Definition of Mr.

used as a title before a man's nameMr. Doe

Medical Definition of mR

 (Entry 1 of 2)


Medical Definition of MR (Entry 2 of 2)

magnetic resonance

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