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sound 1

a. Vibrations transmitted through an elastic solid or a liquid or gas, with frequencies in the approximate range of 20 to 20,000 hertz, capable of being detected by human organs of hearing.
b. Transmitted vibrations of any frequency.
c. The sensation stimulated in the organs of hearing by such vibrations in the air or other medium.
d. Such sensations considered as a group.
2. A distinctive noise: a hollow sound.
3. The distance over which something can be heard: within sound of my voice.
4. Linguistics
a. An articulation made by the vocal apparatus: a vowel sound.
b. The distinctive character of such an articulation: The words bear and bare have the same sound.
5. A mental impression; an implication: didn't like the sound of the invitation.
6. Auditory material that is recorded, as for a movie.
7. Meaningless noise.
8. Music A distinctive style, as of an orchestra or singer.
9. Archaic Rumor; report.
v. sound·ed, sound·ing, sounds
a. To make or give forth a sound: The siren sounded.
b. To be given forth as a sound: The fanfare sounded.
2. To present a particular impression: That argument sounds reasonable.
1. To cause to give forth or produce a sound: sounded the gong.
2. To summon, announce, or signal by a sound: sound a warning.
3. Linguistics To articulate; pronounce: sound a vowel.
4. To make known; celebrate: "Nations unborn your mighty names shall sound" (Alexander Pope).
5. To examine (a body organ or part) by causing to emit sound; auscultate.
Phrasal Verb:
sound off
1. To express one's views vigorously: was always sounding off about higher taxes.
2. To count cadence when marching in military formation.

[Middle English soun, from Old French son, from Latin sonus; see swen- in Indo-European roots.]

sound 2

adj. sound·er, sound·est
1. Free from defect, decay, or damage; in good condition: Is the bridge sound?
2. Free from disease or injury. See Synonyms at healthy.
a. Marked by or showing common sense and good judgment; levelheaded: a sound approach to the problem.
b. Based on valid reasoning; having no logical flaws: a sound conclusion; sound reasoning. See Synonyms at valid.
c. Logic Of or relating to an argument in which all the premises are true and the conclusion follows from the premises.
a. Secure or stable: a partnership that started on a sound footing.
b. Financially secure or safe: a sound economy.
5. Thorough; complete: gave their rivals a sound thrashing.
6. Deep and unbroken; undisturbed: a sound sleep.
7. Compatible with an accepted point of view; orthodox: sound doctrine.
Thoroughly; deeply: sound asleep.

[Middle English, from Old English gesund.]

sound′ly adv.
sound′ness n.

sound 3

1. Abbr. Sd.
a. A long, relatively wide body of water, larger than a strait or a channel, connecting larger bodies of water.
b. A long, wide ocean inlet.
2. Archaic The swim bladder of a fish.

[Middle English, from Old English sund, swimming, sea.]

sound 4

v. sound·ed, sound·ing, sounds
1. To measure the depth of (water), especially by means of a weighted line; fathom.
2. To try to learn the attitudes or opinions of: sounded out her feelings.
3. To probe (a body cavity) with a sound.
1. To measure depth.
2. To dive swiftly downward. Used of a marine mammal or a fish.
3. To look into a possibility; investigate.
An instrument used to examine or explore body cavities, as for foreign bodies or other abnormalities, or to dilate strictures in them.

[Middle English sounden, from Old French sonder, from sonde, sounding line, probably of Germanic origin.]

sound′a·ble adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.soundness - a state or condition free from damage or decay
condition, status - a state at a particular time; "a condition (or state) of disrepair"; "the current status of the arms negotiations"
seaworthiness, fitness - fitness to traverse the seas
airworthiness - fitness to fly; "the plane received a certificate of airworthiness"
unsoundness - a condition of damage or decay
2.soundness - the quality of being prudent and sensible
goodness, good - that which is pleasing or valuable or useful; "weigh the good against the bad"; "among the highest goods of all are happiness and self-realization"
advisability - the quality of being advisable; "they questioned the advisability of our policy"
reasonableness - goodness of reason and judgment; "the judiciary is built on the reasonableness of judges"
unsoundness - not mentally or physically healthy; "no one can be a poet without a certain unsoundness of mind"
3.soundness - the muscle tone of healthy tissue; "his muscular firmness"
strength - the property of being physically or mentally strong; "fatigue sapped his strength"
unsoundness - not mentally or physically healthy; "no one can be a poet without a certain unsoundness of mind"


1. The condition of being free from defects or flaws:
2. The condition of being physically and mentally sound:
3. A healthy mental state:
lucidity, lucidness, mind, reason, saneness, sanity, sense (often used in plural), wit (used in plural).
Slang: marble (used in plural).
4. Reliability in withstanding pressure, force, or stress:
سَلامَه، صِحَّه، دِقَّه
heilbrigîi; traustleiki


[ˈsaʊndnɪs] N (= good condition) [of structure] → firmeza f, solidez f; (= validity) [of ideas, opinions] → validez f; [of argument] → solidez f; (= prudence) [of investment] → prudencia f; (= solvency) [of business] → solvencia f


[ˈsaʊndnɪs] n
[body, mind] → santé f
[structure, building] → solidité f
financial soundness → solidité financière
[advice] → sagesse f; [judgement] → sûreté f


(= good condition)gesunder Zustand; (of building, chassis)guter Zustand
(= validity, dependability)Solidität f; (of argument, analysis)Fundiertheit f, → Solidität f; (of economy, currency)Stabilität f; (of idea, advice, move, policy)Vernünftigkeit f; (of person, goalkeeper)Verlässlichkeit f
(= thoroughness)Gründlichkeit f, → Solidität f
(Jur, of decision, claim) → Rechtmäßigkeit f
(of sleep)Tiefe f


[ˈsaʊndnɪs] n (of body, mind) → sanità; (of argument, judgment) → validità; (of business, building) → solidità; (solvency) → solvibilità


(saund) adjective
1. strong or in good condition. The foundations of the house are not very sound; He's 87, but he's still sound in mind and body.
2. (of sleep) deep. She's a very sound sleeper.
3. full; thorough. a sound basic training.
4. accurate; free from mistakes. a sound piece of work.
5. having or showing good judgement or good sense. His advice is always very sound.
ˈsoundly adverb
ˈsoundness noun
sound asleep
sleeping deeply. The baby is sound asleep.