a.m.基本解釋
abbr.（縮）上午，午前
a.m.的近義詞
a.m.詞典解釋
1. 上午；午前
a.m. is used after a number to show that you are referring to a particular time between midnight and noon.
e.g. The program starts at 9 a.m.
節目上午9點開始。
a.m.英英釋義
adj
1. before noon
Synonym: ante meridiem