Ante Meridian From Latin, "Before Midday." A.M. opposed to PM, Post Meridian or after midday. a word useful for "pussy" in Turkish Amplitude Modulationa means of applying information (voice or music) to a radio signal, beaten by SSB after which FM. in addition: the old broadcast musical organization from 530 to 1710 kHz. A.M. or "ante meridiem" suggests "before noon." Anytime after 11:59 P.M. and before 12:00 P.M. is A.M.If it is A.M. it is early morning. Somebody who doesn't spend there time wisely or doesn't head out often and is unsocialable. Ass guy. Person who really loves ass.Not morning After Midnight.The 22nd Century, non-Latin version of that very late, or early period.