An electromagnetic wave with wavelength between that of infrared light and radio waves.
Many radar systems use a combination of radio waves and microwaves.
Microwaves do not follow the curvature of the earth, but travel in a straight line. They must therefore have unobstructed "line of sight" and the dish aerials have to be sited on towers or high buildings, on high ground, or a combination of all three.1964 August, “The NER's microwave radio-telephone begins work”, in Modern Railways, page 129:
2
Abbreviation, Ellipsis Ellipsis of microwave oven.
Just put it in the microwave for 30 seconds and it's ready to eat.
A vengeful mother-of-three has been jailed for 168 days after being convicted of killing a neighbour's kitten by microwaving the 10-week-old pet.2011 December 14, Steven Morris, “Devon woman jailed for 168 days for killing kitten in microwave”, in Guardian:
2
Slang To provide minimal preparation for implementation, deeming full or extensive preparation as unnecessary.