M1

See also: M-1

English

Noun

M1 (countable and uncountable, plural M1s)

1. (US, money supply) The amount of cash in circulation plus the amount in bank accounts.
2. (mathematics) The number two, as the first Mersenne prime.
3. (computing) A system on a chip designed by Apple which was introduced in 2020.
4. (road transport) A motorway number; notably the M1 Motorway in England.
5. (firearms) A semi-automatic rifle that was the service rifle of the U.S. Army during World War II and the Korean War.

See also

• M0
• M2
• M3