the GNU version of the Collaborative International Dictionary of English
n. An electronic device which extracts the modulation from a radio carrier wave, and outputs the original information-bearing signal.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. rectifier that extracts modulation from a radio carrier wave
Word Usage
"The demodulator, which is designed specifically for the symbol-set used by the modulator, determines the phase of the received signal and maps it back to the symbol it represents, thus recovering the original data."