also a·cous·ti·cal (-st-kl) 1. Of or relating to sound, the sense of hearing, or the science of sound. 2a. Designed to carry sound or to aid in hearing. b. Designed to absorb or control sound: acoustic tile.3.Musica. Of or being an instrument that does not produce or enhance sound electronically: an acoustic guitar; an acoustic bass.b. Being a performance that features such instruments: opened the show with an acoustic set.
NOUN:
Music An acoustic instrument.
ETYMOLOGY:
Greek akoustikos, pertaining to hearing, from akouein, to hear. See kous- in Appendix I.
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