a∙cous∙tic / əˈkustɪk ; əˈku:stɪk / ◙adj 1. relating to sound and the way people hear things • 声音的; 听觉的 2. an acoustic GUITAR or other musical instrument does not have its sound made louder electronically • 〔乐器〕原声的，不加电子设备传声的; --›electric ♦acoustically / -klɪ ; -kli /adv.
