[ aw-dee-oh ]
/ ˈɔ diˌoʊ /


Electronics. designating an electronic apparatus using audio frequencies: audio amplifier.
of, relating to, or employed in the transmission, reception, or reproduction of sound.
of or relating to frequencies or signals in the audible range.


  1. the audio elements of television (distinguished from video).
  2. the circuits in a receiver for reproducing sound.
  3. the audio part of a television broadcast.
the field of sound recording, transmission, reception, and reproduction.

Origin of audio

First recorded in 1920–25; independent use of audio-

Definition for audio (2 of 2)


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 of audio-

< Latin audī- (stem of audīre to hear) + -o- Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for audio

British Dictionary definitions for audio (1 of 2)

/ (ˈɔːdɪˌəʊ) /

noun (modifier)

of or relating to sound or hearingaudio frequency
relating to or employed in the transmission, reception, or reproduction of sound
of, concerned with, or operating at audio frequencies
Compare video

Word Origin for audio

C20: independent use of audio-

British Dictionary definitions for audio (2 of 2)


combining form

indicating hearing or soundaudiometer; audiovisual

Word Origin for audio-

from Latin audīre to hear
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for audio



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