feed back

[feed-bak]

feed·back

[feed-bak]
noun
1.
Electronics.
a.
the process of returning part of the output of a circuit, system, or device to the input, either to oppose the input (negative feedback) or to aid the input (positive feedback).
2.
the furnishing of data concerning the operation or output of a machine to an automatic control device or to the machine itself, so that subsequent or ongoing operations of the machine can be altered or corrected.
3.
a reaction or response to a particular process or activity: He got very little feedback from his speech.
4.
evaluative information derived from such a reaction or response: to study the feedback from an audience survey.
5.
Psychology. knowledge of the results of any behavior, considered as influencing or modifying further performance. Compare biofeedback.
EXPAND
6.
Biology. a self-regulatory biological system, as in the synthesis of some hormones, in which the output or response affects the input, either positively or negatively.
COLLAPSE

Origin:
1915–20; noun use of verb phrase feed back
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Feed back is always a great word to know.
So is interrobang. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
WordNet
feed back

verb
1. submit (information) again to a program or automatic system 
2. respond to a query or outcome 
WordNet® 3.0, © 2006 by Princeton University.
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