M1

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The amount of cash in circulation plus the amount in bank accounts. US, countable, uncountable
  2. 2
    a measure of the money supply; includes currency in circulation plus demand deposits or checking account balances wordnet
  3. 3
    The number two, as the first Mersenne prime. countable, uncountable
  4. 4
    Apple M1, a system on a chip designed by Apple which was introduced in 2020. countable, uncountable
  5. 5
    A semi-automatic rifle that was the service rifle of the U.S. Army during World War II and the Korean War. countable, uncountable

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.