Definition of audio- combining form from the Oxford Advanced Learner's Dictionary

 

audio-

 combining form
combining form
BrE BrE//ˈɔːdiəʊ//
 
; NAmE NAmE//ˈɔːdioʊ//
 
 
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(in nouns, adjectives and adverbs) connected with hearing or sound audiovisual Word Originfrom Latin audire ‘hear’.