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(1)   A flat circular plate
(2)   (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored
(3)   Sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove
(4)   Something with a round shape like a flat circular plate

Alternative spellings

  • disk mainly US, or for magnetic media. See usage note.


  1. A thin, flat, circular plate or similar object.
    A coin is a disc of metal.
  2. An intervertebral disc.
  3. Something resembling a disc.
    Venus' disc cut off light from the Sun.
  4. A vinyl phonograph / gramophone record.
    Turn the disc over, after it has finished.


From Germanic *disk(s) < Latin discus. Cognate with Old High German tisc (German Tisch ‘table’), Old Saxon disk (Dutch dis ‘table’), Old Norse diskr ‘plate’.