/ Dictionary / Index A acoustic feature: Meaning and Definition of Find definitions for: acous'tic fea'ture Pronunciation: [key] — Phonet. Phonet. any acoustic property of a speech sound that may be recorded and analyzed, as its fundamental frequency or formant structure. an acoustic property that defines a class of speech sounds, esp. in distinctive feature analysis, as acute, grave, or diffuse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acoustic coupler acoustic feedback Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language