MR explained

MR, Mr, mr, or mR may refer to:

Mr., an honorific title before any man's name

Arts, entertainment, and media

MR (Marina and Rainer), a 1989, one-act, multilingual opera libretto by Nikolai Korndorf
Mr. (band), a Hong Kong pop-rock band
Magyar Rádió, a Hungarian radio station
Mixed reality, the merging of real and virtual worlds in digital visualisation
Model Railroader, an American hobby magazine
Meta Runner, an Australian web series

Businesses and organisations

Chief Maqoma Regiment, an infantry regiment of the South African Army
Mineral Resources, Australian mining company
Mouvement radical (Radical Movement), a French political party
Mouvement Réformateur (Reformist Movement), a Belgian political party
Martin Research, a defunct American computer company

Education

mr., an academic degree, equivalent to Master of Laws, meester in de rechten, in Belgium and the Netherlands
Menntaskólinn í Reykjavík, a junior college in Iceland

Identification codes

Air Mauritanie (by IATA code)
Marathi language (by ISO 639-1)
Martinique (World Meteorological Organization country code)
Mauritania (ISO 3166-1 alpha-2 and FIPS 10-4 country codes)
- .mr, the top-level Internet domain for Mauritania
Morocco (Library of Congress MARC country code)

Law

Master of the Rolls, the President of the Court of Appeal of England and Wales, Civil Division, and Head of Civil Justice
mr., an academic degree, equivalent to Master of Laws, meester in de rechten, in Belgium and the Netherlands

Medicine

Magnetic resonance imaging
Mental retardation, generalised learning or intellectual disability, in now obsolete jargon
Mineralocorticoid receptor, a human protein
Mitral regurgitation of blood flow in the heart
Modified release

Science

Magnetoresistance, change in electrical resistance due to a magnetic field
Mendelian randomization, a way of using genetic information to estimate causal effects
Merge request in software development
Millirem, a unit of radiation dose
Molecular replacement, a method of solving the phase problem in X-ray crystallography
Relative molecular mass, mass of a given molecule, M_r

Transport

M.R. (automobile), a microcar model built in 1945
Air Mauritanie (by IATA code)
Midland Railway, a United Kingdom railway
Nissan MR engine
Rear mid-engine, rear-wheel-drive layout, an automotive layout

See also