(n) an acronym for microwave amplification by stimulated emission of radiation; an amplifier that works on the same principle as a laser and emits coherent microwave radiation
2. (Physics) [ from Microwave Amplification by Stimulated Emission of Radiation. ] An electronic device producing coherent monochromatic microwave radiation; it produces less noise than other forms of microwave oscillator. [ acronym ] [ PJC ]