from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A fixed device that sends or receives, amplifies, alters, and returns a radar signal, permitting a distant receiver to determine its bearing and sometimes its range.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position


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