Dictionary.com
Thesaurus.com
Synonyms

MR

1 American  
Or M.R.

abbreviation

  1. mixed reality.

  2. motivation research; motivational research.

mR 2 American  
Or mr

  1. milliroentgen; milliroentgens.

Mr. 3 American  
[mis-ter] / ˈmɪs tər /

abbreviation

plural

Messrs

  1. mister: a title of respect prefixed to a man's name or position.

    Mr. Lawson; Mr. President.

  2. a title prefixed to a mock surname that is used to represent possession of a particular attribute, identity, etc., especially in an idealized or excessive way.

    Mr. Democrat; Mr. Perfect; Mr. Macho.
Mr 1 British  
/ ˈmɪstə /

noun

  1. a title used before a man's name or names or before some office that he holds

    Mr Jones

    Mr President

  2. (in military contexts) a title used in addressing a warrant officer, officer cadet, or junior naval officer

  3. a title placed before the surname of a surgeon

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
MR 2 British  

abbreviation

  1. Master of the Rolls

  2. motivation(al) research

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

Plural word for Mr. The plural form of Mr. is Messrs., pronounced [ mes-erz ]. A similar change is made with Mrs., which becomes Mmes, pronounced [ mey-dahm, -dam ]. These irregular nouns’ plural forms derive directly from their  original pluralization in French.

Etymology

Origin of Mr

C17: abbreviation of mister

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

All of these observations closely match what the two-vector MR model predicts, without the need to invoke spin-current-based mechanisms.

From Science Daily • Feb. 10, 2026

Her artwork had been discussed with the ruling coalition in Brussels, including Bouchez's MR -- which did not block its set-up.

From Barron's • Dec. 2, 2025

MR: Well, I think that the cheeriness, the friendliness, they’re kind of clothes, right?

From Los Angeles Times • Apr. 9, 2025

Here’s the Surge’s abbreviated summary of her lengthy opinion, though: MR.

From Slate • Jul. 20, 2024

The suffragists returned to their posts, and fourteen women, including Lucy Burns, were arrested for carrying banners that said, MR.

From "Votes for Women!" by Winifred Conkling

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.