| Acoustic 1. (a.) Pertaining to the sense of hearing; designed to improve sound quality; as, acoustic paneling. 2. (n.) A medicine or agent to assist hearing. Thesaurus Entries audible, audile, audio, auditory, aural, auricular, hearing, hypersonic, otic, otological, otopathic, otoscopic, phonic, sonic, subsonic, supersonic, transonic, transsonic, ultrasonic |