(sound) noun
1. The sensation of hearing, produced by stimulation of the auditory centers of the brain by vibratory waves propagated through the atmosphere or other elastic medium.
2. The vibrations that produce sound waves, having for the normal human ear frequencies from about 20 to 20,000 cycles per second.
3. Noise of any specified quality: the sound of bugles; any tone, voice, or note.
4. Significance; implication: The story has a sinister sound.
5. Sounding or hearing distance; earshot: We were within the sound of battle.
6. Mere noise without significance: full of sound and fury.
7. Obs. Rumor.
—v.i.
1. To give forth a sound or sounds.
2. To give a specified impression; seem: The story sounds true.
—v.t.
3. To cause to give forth sound.
4. To give a signal or order for or announcement of: to sound retreat; to sound the hour.
5. To utter audibly; pronounce.
6. To make known or celebrated: to sound a hero's fame.
7. To test or examine by sound; auscultate.
—to sound in tort To act as or have the nature of a tort. [<OF son <L sonus] Synonyms (noun): noise, note, tone. Sound is the most comprehensive word, applying to anything that is audible. Tone is sound considered from the point of view of quality or pitch, or as expressive of some feeling; noise is sound considered without reference to musical quality or as distinctly unmusical or discordant. In music, tone may denote a musical sound or the interval between two such sounds, but in the most careful usage the latter is now distinguished as the “interval.” Note in music strictly denotes the character representing a sound, but in loose popular usage it denotes the sound also, and becomes practically equivalent to tone.

(sound) adjective
1. Having all the organs or faculties complete and in normal action and relation; healthy.
2. Free from injury, flaw, mutilation, defect, or decay: sound timber.
3. Founded in truth; right; substantial; valid; legal.
4. Correct in views or processes of thought.
5. Solvent.
6. Profound, as rest; deep; unbroken; also, resting profoundly.
7. Complete and effectual; thorough.
8. Solid; stable; firm; safe; hence, trustworthy.
9. Based on good judgment. See synonyms under HEALTHY, SANE¹, STAUNCH, WISE¹. [OE gesund]
—sound′ly adverb
—sound′ ·ness noun

(sound) noun
1. A long and narrow body of water, more extensive than a strait, connecting larger bodies.
2. The air bladder of a fish. [Fusion of OE sund sea, a swimming and ON sund a strait, swimming]

(sound) v.t.
1. To test the depth of (water, etc.), especially by means of a lead weight at the end of a line.
2. To measure (depth) thus.
3. To explore or examine (the bottom of the sea, etc.) by means of a sounding lead adapted for bringing up adhering particles.
4. To discover or try to discover the views and attitudes of (a person) by means of conversation and round-about questions: usually with out.
5. To try to ascertain or determine (beliefs, attitudes, etc.) in such a manner.
6. Surg. To search or examine, as with a sound.
—v.i.
7. To measure depth, as with a sounding lead.
8. To dive down suddenly and deeply, as a whale when harpooned.
9. To make investigation; inquire.
—noun Surg. An instrument for exploring a cavity; a probe. [<OF sonder,? <L sub- under + unda a wave]
—sound′a·ble adjective

(sound), The
See ÖRESUND.