feedback

• POS: Noun, Verb (usu participle)
• HYPHEN: feed=back

CIDE DICTIONARY

feedback, n. 

•  the process in which part of the output of a system is returned to its input.  [WordNet 1.5]
•  response to an inquiry or experiment.  [WordNet 1.5]

OXFORD DICTIONARY

feedback, n.
1 information about the result of an experiment etc.; response.
2 Electronics a the return of a fraction of the output signal from one stage of a circuit, amplifier, etc., to the input of the same or a preceding stage. b a signal so returned.
3 Biol. etc. the modification or control of a process or system by its results or effects, esp. by the difference between the desired and the actual result.

THESAURUS

feedback

birdies, blooping, blurping, closed loop, closed sequence, current-control circuit, degeneration, distortion, flip-flop circuit, flutter, fluttering, hissing, howling, hum, motorboating, positive feedback, process loop, quality loop, reversed feedback, rumble, scratching, shredding, squeals, static, whistles, woomping, wow, wowwows