n. The act or process of measuring the depth of anything; exploration, as with a plummet and line, or a sound.n. The descent of a whale or of a fish to the bottom after being harpooned or hooked.n. plural The depth of water in rivers, harbors, along shores, and even in the open seas, which is ascertained in the operation of sounding.n. In comparatively shoal water: said of a whale in the Arctic Ocean. Bering Sea, Sea of Okhotsk, or in bays, lagoons, etc., whose depths may be readily fathomed.n. The act of producing a sound or a noise; also, a sound or a noise produced; specifically, in music, compare sounds, intransitive verb, 2.Causing or producing sound; sonorous; resounding; making a noise.Having a magnificent or lofty sound; hence, bombastic: as, mere sounding phrases.n. In astronomy, the investigation of the probable distance of the boundaries of the stellar universe by enumerating the number of stars visible in different regions in the field of a given telescope or on a photographic plate.