sound meaning
EN
[saʊnd] [-aʊnd] [(ʂaut)] 
US WSound
- In physics, sound is a vibration that propagates as a typically audible mechanical wave of pressure and displacement, through a medium such as air or water.
EN Sound 
- NounPLsounds
- A sensation perceived by the ear caused by the vibration of air or some other medium.
- He turned when he heard the sound of footsteps behind him . Nobody made a sound.
- A vibration capable of causing such sensations.
- (music) A distinctive style and sonority of a particular musician, orchestra etc.
- Noise without meaning; empty noise.
- (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.
- Puget Sound; Owen Sound
- The air bladder of a fish.
- Cod sounds are an esteemed article of food.
- A cuttlefish.
- A long, thin probe for sounding body cavities or canals such as the urethra.
- A sensation perceived by the ear caused by the vibration of air or some other medium.
- VerbSGsoundsPRsoundingPT, PPsounded
- VI To produce a sound.
- When the horn sounds, take cover.
- (copulative) To convey an impression by one's sound.
- He sounded good when we last spoke.
- That story sounds like a pack of lies!
- VI To be conveyed in sound; to be spread or published; to convey intelligence by sound.
- VI OBS To resound.
- VI (law, often with in) To arise or to be recognizable as arising in or from a particular area of law.
- [T]here can be no doubt that claims brought pursuant to § 1983 sound in tort.
- VT To cause to produce a sound.
- He sounds the instrument.
- VT (phonetics, of a vowel or consonant) To pronounce.
- The "e" in "house" isn't sounded.
- VI Dive downwards, used of a whale.
- The whale sounded and eight hundred feet of heavy line streaked out of the line tub before he ended his dive.
- To ascertain, or try to ascertain, the thoughts, motives, and purposes of (a person); to examine; to try; to test; to probe.
- When I sounded him, he appeared to favor the proposed deal.
- test; ascertain the depth of water with a sounding line or other device.
- Mariners on sailing ships would sound the depth of the water with a weighted rope.
- (medicine) To examine with the instrument called a sound, or by auscultation or percussion.
- to sound a patient, or the bladder or urethra
- VI To produce a sound.
- AdjectiveCOMsounderCOMmore soundSUPsoundestSUPmost sound
- Healthy.
- He was safe and sound.
- In horse management a sound horse is one with no health problems that might affect its suitability for its intended work.
- Complete, solid, or secure.
- Fred assured me the floorboards were sound.
- (mathematics, logic) Having the property of soundness.
- (Britain) SLA Good.
- "How are you?" - "I'm sound."
- That's a sound track you're playing.
- (of sleep) Quiet and deep. Sound asleep means sleeping peacefully, often deeply.
- Her sleep was sound.
- Heavy; laid on with force.
- a sound beating
- Founded in law; legal; valid; not defective.
- a sound title to land
- Healthy.
- AdverbCOMsounderCOMmore soundSUPsoundestSUPmost sound
- Interjection
- (Britain) SLA Yes; used to show agreement or understanding, generally without much enthusiasm.
- "I found my jacket." - "Sound."
- (Britain) SLA Yes; used to show agreement or understanding, generally without much enthusiasm.
- More Examples
- Used in the Middle of Sentence
- But she quickly countered that impression with the warm, almost mezzolike sound she brought to Peter Kelsh’s appealing, neo-Romantic “When Shall We Set Sail for Happiness?”
- There was a crackling sound in the vicinity of my right ear.
- Paranoid behavior, too, is often seen in the manifestation of hostility toward such tales, when the listener thinks that he or she is being challenged by what sounds like an antiguru story.
- Used in the Beginning of Sentence
- Sound off like you got a pair! (drill sergeant in Full Metal Jacket)
- Sound engineering has progressed greatly since the early days of the phonograph.
- Sound my barbaric yawps over the roofs of the world - Walt Whitman
- Used in the Ending of Sentence
- Time had taken its toll on the old bridge, and it was no longer sound.
- He combines the best of classical music with the excitement of the modern sound.
- I'm a light sleeper: I get woken up by the smallest of sounds.
- Used in the Middle of Sentence
Definition of sound in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Adverbs
- Interjections
- Nouns
- Countable nouns
- Countable nouns
- Verbs
- Copulative verbs
- Intransitive verbs
- Transitive verbs
- Copulative verbs
- Adjectives
Source: Wiktionary
Grammatically, this word "sound" is an adjective. It's also an adverb. It's also an interjection. It's also a noun, more specifically, a countable noun. It's also a verb, more specifically, a copulative verb, an intransitive verb and a transitive verb.