(geography) A long narrow inlet, or a strait between the mainland and an island; also, a strait connecting two seas, or connecting a sea or lake with the ocean. / The air bladder of a fish.

(intransitive) Dive downwards, used of a whale. / To ascertain, or try to ascertain, the thoughts, motives, and purposes of (a person); to examine; to try; to test; to probe.

A long, thin probe for sounding or dilating body cavities or canals such as the urethra; a sonde.

The strait that separates Zealand (an island of Denmark) from Scania (part of Sweden); also sometimes called by the Danish name, Øresund. / Synonym of Plymouth Sound, Devon, England.

plural of sound

Third-person singular simple present indicative form of sound

simple past tense and past participle of sound

(uncountable) The state or quality of being sound. / (countable) The result or product of being sound. / (logic) The property (of an argument) of not only being valid, but also of having true premises.

plural of soundness

Full of sound; melodious