A.m.
adj, adv, noun
adj, adv, noun ·Rare ·Advanced level
Definitions
Noun
- 1 Initialism of anno mundi. abbreviation, alt-of, countable, initialism, uncountable
- 2 the period between midnight and noon wordnet
- 3 Initialism of Master of Arts. abbreviation, alt-of, countable, initialism, uncountable
Adjective
- 1 Initialism of ad modum. abbreviation, alt-of, initialism, not-comparable
Adverb
- 1 Alternative form of a.m. (“before noon”). alt-of, alternative, not-comparable
- 2 In the 12-hour period from midnight to noon (the first half of the day) when using the 12-hour clock. not-comparable
"Greenfield … Monday thru Friday, 9 to 12 a.m."
Adverb
- 1 before 12 noon wordnet
Antonyms
All antonymsExample
More examples"Greenfield … Monday thru Friday, 9 to 12 a.m."
Etymology
Abbreviation of ante meridiem (“before noon”).
More for "a.m."
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.