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Definition of microwave
an electromagnetic wave with a wavelength in the range 0.001-0.3 m, shorter than that of a normal radio wave but longer than those of infrared radiation. Microwaves are used in radar, in communications, and for heating in microwave ovens and in various industrial processes.
verb [with object]
cook (food) in a microwave oven.
- (also microwavable) adjective