vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear

light travels faster than sound

sound produced by continuous and regular vibrations, as opposed to noise

music, speech, and sound effects when recorded and used to accompany a film, video, or broadcast

a sound studio

an idea or impression conveyed by words

you've had a hard day, by the sound of it

emit or cause to emit sound

a loud buzzer sounded

she sounded the horn

convey a specified impression when heard

he sounded worried

in good condition; not damaged, injured, or diseased

they returned safe and sound

based on valid reason or good judgement

sound advice for healthy living

the scientific content is sound

(of sleep) deep and undisturbed

a doze that deepened into a sound sleep

(of a beating) severe

such people should be given a sound thrashing

soundly

he was sound asleep

ascertain (the depth of water in the sea, a lake, or a river), typically by means of a line or pole or using sound echoes

Mr Pattison was sounding the depth of the water with a pole

question (someone) discreetly or cautiously so as to ascertain their opinions on a subject

we'll sound out parliament first

examine (a person's bladder or other internal cavity) with a long surgical probe

(especially of a whale) dive down steeply to a great depth

he sounded, arching his back steeply and raising his rubbery flukes in the air

a long surgical probe, typically with a curved, blunt end

a narrow stretch of water forming an inlet or connecting two wider areas of water such as two seas or a sea and a lake

a small rowing boat came from the south on its way into the sound