audio

[aw-dee-oh]
adjective
1.
Electronics. designating an electronic apparatus using audio frequencies: audio amplifier.
2.
of, pertaining to, or employed in the transmission, reception, or reproduction of sound.
3.
of or pertaining to frequencies or signals in the audible range.
noun
4.
Television.
a.
the audio elements of television (distinguished from video ).
b.
the circuits in a receiver for reproducing sound.
c.
the audio part of a television broadcast.
5.
the field of sound recording, transmission, reception, and reproduction.

Origin:
1920–25; independent use of audio-

Dictionary.com Unabridged

audio-

a combining form used in the formation of compound words, with the meanings: “sound within the range of human hearing” (audiometer ); “hearing” (audiology ); “sound reproduction” (audiophile ).

Origin:
< Latin audī- (stem of audīre to hear) + -o-

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
audio (ˈɔːdɪˌəʊ)
 
n
1.  of or relating to sound or hearing: audio frequency
2.  relating to or employed in the transmission, reception, or reproduction of sound
3.  of, concerned with, or operating at audio frequencies
 
[C20: independent use of audio-]

audio-
 
combining form
indicating hearing or sound: audiometer; audiovisual
 
[from Latin audīre to hear]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

audio
"sound, especially recorded or transmitted," 1934, abstracted from prefix audio- (in audio-frequency, 1919, etc.), from L. audire "hear" (see audience).

audio-
from L. audire "hear," (see audience); first used in Eng. as a word-formation element 1913.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

audio- pref.

  1. Hearing: audiology.

  2. sound: audiogenic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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FOLDOC
Computing Dictionary

audio definition

file format
Sound, one component of multimedia. Computers (and audio compact discs and digital audio tape) work with digital audio, in contrast to vinyl disks or analogue tape.
(1999-07-30)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
The audio quality of different devices and approaches varies widely.
Add audio captions to travel photos and mementos by using this innovative
  digital recorder and playback device.
It was a beautiful day, good for pictures and video, but windy enough to
  interfere with audio recording.
The bedside panel also controls home security, lighting, and audio.
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