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

microwave radiation

an appliance that uses microwaves to cook or heat food

a cheesecake was defrosting in the microwave

cook (food) in a microwave oven

he microwaved some steak out of the freezer