audio UK /ˈɔːdi.əʊ/US /ˈɔ.di.oʊ/noun 2adjective 1forms 3 noun2 •Sound, or a sound signal. •A piece of sound that is recorded electronically.I DMed him an audio of myself singing the South Park intro. adjective1 •Focused on audible sound, as opposed to sight.If you're more audio than visual, tune in on the "A-V Soap Opera" (page 375). — 1955 formsaudios · more audio · most audio