Definition of a.m. abbreviation from the Oxford Advanced Learner's Dictionary



(North American English also A.M.) abbreviation
BrE BrE//ˌeɪ ˈem//
; NAmE NAmE//ˌeɪ ˈem//
jump to other results
between midnight and midday (from Latin ante meridiem) It starts at 10 a.m. compare p.m. Word Originfrom Latin ante meridiem.
See the Oxford Advanced American Dictionary entry: a.m.