AM
AM
/ˈeıˌɛm/ noun [ noncount ]
: a system for sending radio signals in which the height of a radio wave is changed in order to send information in the form of sound
◇ AM is an abbreviation for amplitude modulation. — compare
AM adj
listening to my favorite AM station [=a radio station that sends sound using AM]
Is this station AM or FM?
AM radios
