the letter M; m
Refers to the Latin letter itself, used in abbreviations, symbols, and as a character.
アルファベットのＭはエムと読む。
The letter M in the alphabet is read as 'emu'.
Abbreviation for metre/meter; usually read as メートル in Japanese.
このケーブルは長さ３Ｍです。
This cable is 3 metres long.
Abbreviation for masochist/masochistic, often used in contexts like SM (sadomasochism).
See also: Ｓ
彼はどちらかというとＭだ。
He is more of an M, if anything.
Used as a symbol or abbreviation for male gender, e.g., on forms or in biological contexts.
性別欄にＭと記入してください。
Please write M in the gender field.
Abbreviation for medium, as in clothing size or other sizing contexts.
このＴシャツのサイズはＭです。
The size of this T-shirt is M.
one thousand (Roman numeral)
Represents the number 1000 in Roman numerals.
ローマ数字のＭは1000を表す。
The Roman numeral M represents 1000.
Abbreviation for magnitude, especially in astronomy or seismology.
その星の等級は５Ｍです。
The magnitude of that star is 5.
Abbreviation for Mach number, used in aerodynamics.
その飛行機はＭ２で飛行している。
The aircraft is flying at Mach 2.
milli-; m
Prefix meaning one-thousandth; the symbol m is more common, but M is sometimes used in specific contexts.
ｍｍはミリメートルの略で、最初のｍがミリを表す。
mm is an abbreviation for millimetre; the first m stands for milli-.
Prefix meaning one million; commonly used in computing and electronics (e.g., MB for megabyte).
このファイルのサイズは５ＭＢです。
The size of this file is 5 MB.
Abbreviation for the color magenta, used in printing (CMYK).
印刷では、Ｍはマゼンタを意味する。
In printing, M stands for magenta.
Slang and archaic term for money, possibly from the first letter of 'money' or from old criminal jargon.
In old slang, M referred to money.
Full-width lowercase variant; less common but seen in some contexts.
The letter M, used as a symbol or abbreviation for various concepts. The reading エム comes from English 'em'. Many senses are domain-specific abbreviations.