from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of very high frequency radio waves reflected from their surfaces.
- n. The equipment used in such detection.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of sent radio waves (usually microwaves) reflected from their surfaces
- n. A type of system using such method, differentiated by platform, configuration, frequency, power, and other technical attributes.
- n. An installation of such a system or of the transmitting and receiving apparatus.
- n. A superior ability to detect something.
- v. To scan with radar, or as if with radar.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects
ra(dio) d(etecting) a(nd) r(anging).(American Heritage® Dictionary of the English Language, Fourth Edition)
Originally spelled RADAR; an acronym of radio detection and ranging. (Wiktionary)