MR

UK: /ˈmɪstə^r/ US: /ˈmɪstɚ/ ,(mis′tər)

Inflections of 'Mr' (n): npl: Messrs (UK)

WordReference Random House Unabridged Dictionary of American English © 2026

MR, 

1. motivation research.
2. Moral Re-Armament.
Also, M.R. 

mR, 

1. Physics milliroentgen;
   milliroentgens.

Also, mr 
Mr.  (mis′tər), pl. Messrs. 

(mes′ərz). 
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., esp. in an idealized or excessive way:
   Mr. Democrat;
   Mr. Perfect;
   Mr. Macho.

Collins Concise English Dictionary © HarperCollins Publishers::

MR abbreviation

1. (in Britain) Master of the Rolls
2. mixed reality
3. motivation(al) research

WordReference Random House Learner's Dictionary of American English © 2026

Mr. /ˈmɪstɚ/   pl. Messrs. 

/ˈmɛsɚz/.  
1. mister;
   a title of respect used before a man's name, or sometimes before a position:
   Mr. Jones is here. Mr. President, what are your views on the situation?
2. (used before an imagined name to express the opinion that the man so named possesses a particular quality, characteristic, identity, etc.):
   She's waiting for Mr. Right.

Collins Concise English Dictionary © HarperCollins Publishers::

Mr / ˈmɪstə/ noun ( Messrs / ˈmɛsəz/)

1. a title used before a man's name or names or before some office that he holds: Mr Jones, Mr President

Etymology: 17th Century: abbreviation of mister