noise
n. C / Un. a sound that is often loud, unpleasant, or not wanted. It can also mean extra information that makes it hard to see the real message.
n. a sound, especially one that is loud, unpleasant, or causes a disturbance. In technical contexts, it refers to random fluctuations or irrelevant data that obscure a signal.
The loud noise from the street wakes me up.
The neighbors made so much noise last night that I had to call the building manager.
In data science, researchers must filter out the background noise to identify the subtle patterns that indicate a significant change in the climate.
From Middle English noyse, noise, from Old French noise (“a dispute, wrangle, strife, noise”), of uncertain origin. According to some, from Latin nausia, nausea (“disgust, nausea”); according to others, from Latin noxia (“hurt, harm, damage, injury”); but neither explanation is satisfactory in regard to either form or sense. Potentially a reduced form of Old French enoiier (“to bother, to disturb”), from Latin inodio (“to make repulsive”) - which would make it a doublet of English annoy (“to bother, to irritate”) and English ennui (“boredom, jadedness, depression”). Compare Piedmontese nojé (“to bother, to annoy”), though this fails to explain the final /z/.
Uncountable when referring to the general concept of sound; countable when referring to a specific, distinct sound ('a loud noise').
He made a lot of noisesHe made a lot of noiseWhen referring to general loud sound, the word is uncountable; 'noises' usually implies several distinct, different sounds.
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Box of toys
[Cockney slang]noise
As a box of toys, particularly a new one given as a present at Christmas time, causes a great deal of noise to be made.
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food noise
A mental preoccupation with food that is differentiable from hunger and from cravings but tends to urge people to overeat.
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make a noise in the world
To attract great notoriety.