auditory UK /ˈɔː.dɪ.tə.ɹi/US /ˈɔː.dɪˌtɔɹ.i/adjective 1noun 2forms 1 adjective1 •Of, or relating to hearing, or to the sense or organs of hearing. noun2 •(no longer used) Synonym of audience....and because though these learned Gentlemen (sayes he, turning to his two friends) need not fear to discourse before any Auditory... — 1661 •(no longer used) Synonym of auditorium. formsauditories