mr

mr is the abbreviation of millirem.

Meaning of millirem

Noun

millirem (plural millirems)

One thousandth of a rem

Synonyms:

mrem

Proper noun capitalized: MR

(UK, abbreviation, initialism) Initialism of Midland Railway.

Synonyms:

Midland

Noun (1) capitalized: MR

MR (countable and uncountable, plural MRs)

(abbreviation, clipping) Clipping of MRI (“magnetic resonance image/imager/imaging”).
- 2007 March 30, Elizabeth Mossis, M.D. (guest),“Breast Cancer Screening Guidelines”, Talk of the Nation: Science Friday, Ira Flatow (host), National Public Radio
(abbreviation, initialism) Initialism of modified release.
- Controlled release (CR), modified release (MR), orally disintegrating tablets (ODT), and other innovative dosage forms are still of interest to both pharmaceutical producers and suppliers.2014 April, Ken Seufert, “The New Dawn of Pharmaceutical Manufacturing: Innovative Solutions for Unprecedented Challenges”, in American Pharmaceutical Review, 17(3):8
(abbreviation, initialism) Initialism of mitral regurgitation.

Synonyms:

MI
(abbreviation, initialism) Initialism of mineralocorticoid receptor.
(abbreviation, initialism, prison system) Initialism of mandatory release.
(abbreviation, initialism) Initialism of meeting record, the best performance at all occurrences of a particular athletic meeting.
(US, abbreviation, acronym) Acronym of memorandum for the record, memorandum for record, memo for the record, or memo for record.

Synonyms:

MFR
(abbreviation, initialism) Initialism of merge request.

Synonyms:

PR
(abbreviation, initialism) Initialism of mixed reality.
(abbreviation, initialism) Initialism of Master of the Rolls, as a postnominal.
- Lord Denning MR
(abbreviation, initialism) Initialism of mortality rate.

Synonyms:

DR, death rate
(abbreviation, initialism) Initialism of mental retardation, a deprecated former term for intellectual disability.

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(abbreviation, initialism) Initialism of magnetic resonance
(abbreviation, initialism) Initialism of magnetoresistance
(abbreviation, initialism) Initialism of magic resistance.

Adjective capitalized: MR

MR (not comparable)

(abbreviation, initialism, special) Initialism of mentally retarded.
(abbreviation, initialism) Initialism of magnetoresistive

Noun (2) capitalized: Mr

Mr (plural Messrs)

(British, abbreviation, especially) Abbreviation of Mister.
- [...] Patrick lord Ruthven, Sir John Maxwell of Teregles, knight, William Maitland of Lethington younger, John Wiseheart of Pittarrow, and Mr Henry Balnaves of Hallhill, in name and behalf a noble and mighty prince James, duke of Chatelherault, second person of the realm of Scotland, and the...1560, Treaty of Berwick
- In recent months Mr Balaji had publicly spoken out against artificial intelligence company OpenAI's practices, which has been fighting a number of lawsuits relating to its data-gathering practices.2024 December 14, Alys Davies, “OpenAI whistleblower found dead in San Francisco apartment”, in BBC
(British, abbreviation, especially) Abbreviation of March.

Synonyms of mr

Forms of mr

plural	mr
plural	MRs
plural	Messrs

Origin of mr

Abbreviation.

Abbreviation of Mister.

Words formed from mr

Mr Fixit

Phrases with mr

10 more phrasesFewer phrases

Questions about mr

What is mr the abbreviation of?: Mr is the abbreviation of millirem.
What part of speech is mr?: Mr can be a proper noun, a noun or an adjective.

Words near mr in the dictionary

Adapted from Wiktionary: mr (page history and authors); MR (page history and authors); Mr (page history and authors); millirem (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated: 2026-09-02

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Wodencafe-mr.wav, En-uk-Mr.ogg.

Cite this entry: “mr.” Word.ws, https://word.ws/mr. Based on Wiktionary, CC BY-SA 4.0.