Meaning of noise In English

• 0 a sound or sounds, especially when it is unwanted, unpleasant, or loud:

  • The noise out in the street was deafening.

  • I heard a loud noise and ran to the window.

  • traffic/background noise

  • dangerously high noise levels

• 1 any bad change in a signal, especially in a signal produced by an electronic device:

  • Using a single chip reduces (the) noise on the output signal by 90 percent.

• 2 unexplained or unexpected information in a sample that is not useful and that can be ignored:

  • There will be a certain amount of statistical noise in the numbers.

• 3 (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.

• 4 unnecessary information or activity:

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

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

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