a.m.基本解释
abbr.（缩）上午，午前
a.m.的近义词
a.m.词典解释
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.
节目上午9点开始。
a.m.英英释义
adj
1. before noon
Synonym: ante meridiem