Longman Dictionary of Contemporary English homepage

Date: 1200-1300
Language: Old French
Origin: son, from Latin sonus

sound

1 noun
     
sound1 S1 W1
1 [uncountable and countable] something that you hear, or what can be heard [= noise]:
There were strange sounds coming from the next room.
sound of
She could hear the sound of voices.
the distant sound of rushing water
banging/barking/tearing etc sound
Did you just hear a rattling sound outside?
Light travels faster than sound.
a vowel sound
not make a sound (=be completely quiet)
2 [uncountable]
a) TCBAMT the sound produced by a television or radio programme, a film etc:
We apologize for the loss of sound during that report.
a sound engineer
b) AM the loudness of a television, radio, film etc [= volume]
turn the sound down/up
Turn the sound down a little, will you?
3 [countable usually singular, uncountable] the particular quality that a singer's or group's music has:
We're trying to develop a harder, funkier sound.
4

by/from the sound of it/things

judging from what you have heard or read about something:
By the sound of it, things are worse than we thought.
5

not like the sound of something

to feel worried by something that you have heard or read:
'There's been a slight change in our plans.' 'I don't like the sound of that.'
6

sounds

[plural] British English informal songs or music that are on a record, CD, or tape:
I need to buy some new sounds.
7 [countable usually singular] a narrow area of water that connects two larger areas of water

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