acoustic

adjective

acous·​tic ə-ˈkü-stik 

variants or acoustical

ə-ˈkü-sti-kəl 

1

: of or relating to the sense or organs of hearing, to sound, or to the science of sounds

acoustic apparatus of the ear

acoustic energy

: such as

a

: deadening or absorbing sound

acoustic tile

b

: operated by or utilizing sound waves

2

: of, relating to, or being a musical instrument whose sound is not electronically modified

acoustically

ə-ˈkü-sti-k(ə-)lē 

adverb

Synonyms of acoustic

• auditory

Examples of acoustic in a Sentence

the acoustic properties of a room

She loves listening to acoustic folk music.

an acoustic performance of a rock-and-roll song

Recent Examples on the Web

Now, the city of West Haven has released findings from the acoustic study that was done, identifying a source of the noise complaints in the residential area surrounding Heffernan Drive and sharing corrective actions being taken, officials said. — Staff Report, Hartford Courant, 22 June 2026

And with very little preparation, the girl — dressed in a yellow T-shirt, cut-off jean shorts and a cowboy hat — proceeded to sing an extended acoustic version of the song with one of country music’s biggest stars. — Théoden Janes, Charlotte Observer, 21 June 2026

For anyone who wants to capture a pristine acoustic track at the top of a mountain, this is the way to do it. — Mark Sparrow, Forbes.com, 21 June 2026

Alex Zhang Hungtai collages a bewildering array of acoustic, electric, ancient, and modern sounds on this noirish double album, improvised and composed over several years with an ad-hoc coterie that includes string and woodwind players, a noise musician, a Korean gong resonator, and a tap dancer. — Hattie Lindert, Pitchfork, 19 June 2026

Word History

Etymology

acoustic borrowed from Medieval Latin acousticus, acūsticus, borrowed from Greek akoustikós, from akoustós "heard, audible" (verbal adjective of akoúein "to hear," going back to Indo-European *h₂kou̯s-) + -ikos -ic entry 1; acoustical from acoustic + -al entry 1 — more at hear

First Known Use

1635, in the meaning defined at sense 1

Phrases Containing acoustic

• acoustic emission

Rhymes for acoustic

• electroacoustic

Kids Definition

acoustic

adjective

acous·​tic ə-ˈkü-stik 

variants or acoustical

-sti-kəl 

1

: of or relating to the sense or organs of hearing, to sound, or to the science of sounds: as

a

: deadening or absorbing sound

b

: operated by or using sound waves

2

: of, relating to, or being a musical instrument whose sound is not electronically modified

acoustic guitar

acoustically

-sti-k(ə-)lē 

adverb

Medical Definition

acoustic

adjective

acous·​tic ə-ˈkü-stik 

variants or acoustical

-sti-kəl 

: of or relating to the sense or organs of hearing, to sound, or to the science of sounds

acoustic apparatus of the ear

acoustic energy

: as

a

: deadening or absorbing sound

acoustic tile

b

: operated by or utilizing sound waves

acoustically

-k(ə-)lē 

adverb