Healthy. Complete, solid, or secure. (mathematics, logic) Having the property of soundness. (Britain, slang) Good; acceptable; decent. (of sleep) Quiet and deep. Sound asleep means sleeping peacefully, often deeply. Heavy; laid on with force. Founded in law; legal; valid; not defective. Soundly. (Britain, slang) Yes; used to show agreement or understanding, generally without much enthusiasm. A sensation perceived by the ear caused by the vibration of air or some other medium. A vibration capable of causing such sensations. (music) A distinctive style and sonority of a particular musician, orchestra etc Noise without meaning; empty noise. Earshot, distance within which a certain noise may be heard. (intransitive) To produce a sound. (copulative) To convey an impression by one's sound. (intransitive) To be conveyed in sound; to be spread or published; to convey intelligence by sound. (intransitive, obsolete) To resound. (intransitive, law, often with in) To arise or to be recognizable as arising in or from a particular area of law. (transitive) To cause to produce a sound. (transitive, phonetics, of a vowel or consonant) To pronounce. (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. A cuttlefish. (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. Test; ascertain the depth of water with a sounding line or other device. (medicine) To examine with the instrument called a sound or sonde, or by auscultation or percussion. (medicine) An instrument for probing or dilating; a sonde. A long, thin probe for sounding body cavities or canals such as the urethra.