What do the initials a. m. stand for?
The meaning of A.M. depends on the specific context, but most often stands for ante meridian, or before noon -- that is, the period of time from midnight to noon. In radio, it stands for amplitude modulation, one of two ways that radio waves can carry sound.
Join Alexa Answers
Help make Alexa smarter and share your knowledge with the worldLEARN MORE