I. ˈā-ˌem noun
Usage: often attributive
Etymology: a mplitude m odulation
Date: 1940
: a broadcasting system using amplitude modulation ; also : a radio receiver of such a system
II. abbreviation
1. airmail
2. Air Medal
3.
[Latin anno mundi ]
in the year of the world — often printed in small capitals
4. ante meridiem — often not cap and often punctuated
5.
[New Latin artium magister ]
master of arts