a.m. meaning in Etymology Dictionary
in mention of the hours, 1762, abbreviation of Latin ante meridiem "before noon."
View more
- additionally in the morning, form of radio wave broadcast, 1921, abbreviation of amplitude modulation.
a.m. meaning in General Dictionary
before noon
Sentence Examples with the word a.m.
It was after 4 a.m. when the pair slid into the brightly lit parking lot of the Philadelphia hospital.