An AM is a member of the Welsh Assembly. AM is an abbreviation for `assembly member'. Am. is a written abbreviation for American. am WEAK STRONGAm is the first person singular of the present tense of be. Am is often shortened to 'm in spoken English. The negative forms are `I am not' and `I'm not'. In questions and tags in spoken English, these are usually changed to `aren't I'. Armenia (in Internet addresses). The symbol for the element americium. Amos. First person singular present indicative of be. the first person singular of the present tense of the verb be. in full amplitude modulation Variation of the amplitude of a carrier wave (commonly a radio wave) in correspondence to fluctuations in the audio or video signal being transmitted. AM is the oldest method of broadcasting radio programs. Commercial AM stations operate in the frequency range of 535 to 1605 kHz. Because radio waves of these frequencies are reflected back to the Earth's surface by the ionosphere, they can be detected by receivers hundreds of miles away. In addition to commercial radio broadcasting, AM is also employed in short-wave radio broadcasts, and in transmitting the video portion of television programs. See also FM
artium magister (hümaniter bilimlerde master derecesinin kısaltması)