M (disambiguation)

M, or m, is the thirteenth letter of the English alphabet.

M may also refer to:

Companies and products

 * M (fragrance), a 2008 fragrance by Mariah Carey
 * M-series rangefinder, a series of Leica camera models
 * M (virtual assistant), a former virtual assistant in Facebook Messenger
 * Macy's, Inc. (NYSE: M), an American department store chain
 * Mercedes-Benz M-Class
 * Miracle Mart, a Canadian department store known simply as "M" from 1986 to 1992
 * Android M, a code name for the Android Marshmallow operating system
 * BMW M, a subsidiary of car manufacturer BMW
 * Farmall M, a tractor produced by International Harvester from 1939 to 1952
 * Infiniti M, a line of cars

Numbers and units of measurement

 * metre, symbol m
 * mile (abbr.)
 * nautical mile
 * milli-, SI prefix m
 * 1000 (number), Roman numeral M
 * mega-, SI prefix M
 * million (abbr.)
 * minute, symbol m

Postal codes

 * M, the postal code letter for Toronto in Canada
 * M postcode area, a group of several postcode districts in Greater Manchester

Science and technology

 * M (videocassette format), an obsolete recording format
 * M-theory, a proposed solution for problems in superstring theories
 * M band, radio frequencies from 60 to 100 GHz
 * Mass (symbol m)
 * Magnetic quantum number (symbol m)
 * Messier object, in astronomy
 * Metal (placeholder symbol M)
 * Methionine, an alpha amino acid in biochemistry
 * Molality (symbol m)
 * Molar concentration, unit
 * Molar mass, (symbol M)
 * ATC code M Musculo-skeletal system, a section of the Anatomical Therapeutic Chemical Classification System
 * Seismic magnitude scales, various scales of magnitude using variations of M
 * Slope, represented by variable m in a linear equation

Computing

 * M or Wolfram Language, the programming language underlying Mathematica
 * ".m", a MATLAB or GNU Octave file
 * ".m", a Mathematica package
 * ".m", an implementation file in Objective-C
 * M, the MUMPS programming language
 * M Sharp (programming language)
 * M-code or just M, MATLAB programming language

Transportation

 * Mu (rocket family), also known as M, a series of Japanese solid-fuelled carrier rockets
 * Rapid transit, sometimes called "Metro" and shortened to an M.
 * M, the prefix used for British motorways

Specific rail lines identified by the symbol "M"

 * M (New York City Subway service)
 * M Ocean View, San Francisco, U.S.
 * Tokyo Metro Marunouchi Line, Tokyo Metro
 * Midōsuji Line, Osaka Metro
 * Honshi–Bisan Line, West Japan Railway Company

Characters

 * M (Marvel Comics), a character associated with the X-Men universe
 * M (James Bond), the codename of the fictional head of MI6
 * Minoru Kokubunji (M), a Chobits anime character

Film and television

 * M (1931 film), a German film directed by Fritz Lang
 * M (1951 film), a remake of the previous, shifting the action from Berlin to Los Angeles
 * M, a 2006 Japanese film directed by Ryūichi Hiroki
 * M (2007 film), made in South Korea
 * M (2018 Finnish film), a film directed by Anna Eriksson, loosely inspired by the last days of Marilyn Monroe
 * M (2018 French film), a documentary film directed by Yolande Zauberman about child abuse in Bnei Brak
 * M, an obsolete film rating in the American Motion Picture Association of America film rating system
 * M, films recommended for mature audiences in the Australian Office of Film and Literature Classification
 * M, the production code for the 1965 Doctor Who serial The Romans
 * Manchete, a Brazilian television network
 * M. Son of the Century (miniseries), a 2024 television adaptation of M: Son of the Century

Print publications

 * M (comic strip), a Norwegian comic strip
 * M (John Cage book), a 1973 book by avant garde composer John Cage
 * M (Peter Robb book), a 1998 book by Peter Robb about the Italian painter Caravaggio
 * M (magazine), a monthly teenage magazine published by Bauer Media Group
 * M: Son of the Century, a 2018 historical novel by Antonio Scurati

Video games

 * M, short for mature, a rating used by the Entertainment Software Rating Board to denote that a video game contains mature content

Performers

 * M (band), a British techno-pop project of the artist Robin Scott
 * Matthieu Chedid, French singer (stage name "-M-")
 * Lee Min-woo, Korean singer (stage name "M")
 * Mem Nahadr, American singer and performance artist (stage name "M")

Albums

 * M (John Abercrombie Quartet album), 1981
 * M (Myrkur album), 2015
 * M (Big Bang single album), 2015

Songs

 * "M" (song), a 2000 song by Ayumi Hamasaki
 * "M", a song by Chantal Kreviazuk from her album Colour Moving and Still
 * "M", a song by The Cure from their 1980 album Seventeen Seconds
 * "M", a song by Princess Princess from the 1989 album Diamonds
 * "M's" (song), a 2015 song by ASAP Rocky

Other uses

 * M Resort, a hotel-casino in Las Vegas, Nevada, U.S.
 * M-Source, a hypothetical source document for the Gospel of Matthew
 * Moderaterna, a Swedish political party
 * Baby M, subject of a famous child custody battle
 * , the International Phonetic Alphabet symbol for a voiced bilabial nasal sound
 * М, a letter of the Cyrillic alphabet
 * M-ratio, a measure of the health of a player's chip stack in poker
 * \m/, a common way of typing corna or devil's horns
 * 'm, contraction of am, part of the English copular verb to be
 * M, the symbol for the old German currency German gold mark
 * m, the masculine grammatical gender
 * m or M, the male gender
 * M., the abbreviation for Monsieur
 * M., the regnal year abbreviation for Mary I of England following her marriage to Philip II of Spain
 * m., married
 * m. or man., an abbreviation for the Azerbaijani manat (currency)
 * m., short for measure (music), a segment of time corresponding to a specific number of beats
 * 𝕸, the Masoretic Text, the authoritative Hebrew text of the Tanakh
 * Mike, the military time zone code for UTC+12:00
 * Honório de Freitas Guimarães (1902–1968), member of the Brazilian Communist Party