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What does noise mean?

Looking for the meaning or definition of the word noise? Here's what it means.

Noun
  1. Various sounds, usually unwanted or unpleasant.
  2. Sound or signal generated by random fluctuations.
  3. (technology) Unwanted part of a signal. (Signal to noise ratio)
  4. (genetics) The measured level of variation in gene expression among cells, regardless of source, within a supposedly identical population.
  5. Rumour or complaint.
  6. (obsolete) Music, in general; a concert; also, a company of musicians; a band.
  7. (music) A genre of rock music that uses static and other non-musical sounds, also influenced by art rock.
Verb
  1. (intransitive) To make a noise; to sound.
  2. (transitive) To spread news of; to spread as rumor or gossip.
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