abbr.（缩）上午，午前

名词AM

p.m.

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。

1. a.m.的翻译

adj

1. before noon

Synonym: ante meridiem