Electromagnetic wave with a wavelength in the range 0. 3 to 30 cm/0.1 in to 12 in, or 300–300,000 megahertz (between radio waves and infrared radiation). Microwaves are used in radar, in radio broadcasting, and in microwave heating and cooking.
1. A very short electromagnetic wave.
2. An appliance that cooks food by passing an electromagnetic wave through it; SYN. microwave oven.
An oven in which food is cooked by the heat produced by the absorption of microwave energy by water molecules in the food