Meaning of “noise” in the English Dictionary

(Definition of “noise” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"noise" in American English

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noisenoun [ C/U ]

us /nɔɪz/

(a) sound, esp. when it is unwanted, unpleasant, or loud:

[ U ] I heard background noise on the phone line.
[ C ] If the washing machine gets out of balance, it makes a horrible noise.
noisy
adjective [ -er/-est only ] us /ˈnɔɪ·zi/

The garbage truck is so noisy it wakes me up in the morning.

(Definition of “noise” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"noise" in Business English

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noisenoun [ U ]

uk /nɔɪz/ us

unnecessary information or activity:

The CEO was accused of making unnecessary noise to distract the board from the main issue.

a change in a signal, especially one produced by electronic equipment:

Using a single chip reduces the noise on the output signal by 90%.

(Definition of “noise” from the Cambridge Business English Dictionary © Cambridge University Press)