sound
n. C / U C1 Advanced Oxford US //ˈsaʊnd// UK //sˈaʊnd// sound
n. something that you can hear with your ears. It can be loud like a drum or quiet like a whisper.
n. vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear.
The sound of the rain is very relaxing.
The sudden sound of a car alarm outside interrupted our conversation and made everyone look toward the window.
Acoustic engineers must carefully consider how sound reflects off different surfaces to ensure that every seat in the concert hall receives a balanced auditory experience.
Usage
Countable when referring to a specific noise; uncountable when referring to the general phenomenon of auditory vibrations.