disk

UK: /ˈdɪsk/ US: /dɪsk/ ,(disk)

WordReference Random House Learner's Dictionary of American English © 2026

disk /dɪsk/   n. [countable]

1. any thin, flat, circular plate or object.
2. any surface that is flat and round, or seemingly so:
   the disk of the sun.
3. Sound Reproduction disc (def. 1).
4. Computing any of several types of materials for storing electronic or computer data, consisting of thin round plates of plastic or metal.
5. Botany, Zoology any of various roundish, flat anatomical structures, esp. between the bones of the backbone.

WordReference Random House Unabridged Dictionary of American English © 2026

disk  (disk), n. 

1. any thin, flat, circular plate or object.
2. any surface that is flat and round, or seemingly so:
   the disk of the sun.
3. Sound Reproduction disc (def. 1).
4. Computing any of several types of media consisting of thin, round plates of plastic or metal, used for external storage:
   magnetic disk;
   floppy disk;
   optical disk.
5. Botany, Zoology any of various roundish, flat structures or parts.
6. See intervertebral disk. 
7. Botany (in the daisy and other composite plants) the central portion of the flower head, composed of tubular florets.
8. any of the circular steel blades that form the working part of a disk harrow.
9. Mathematics the domain bounded by a circle.
10. [Archaic.] discus.

v.t. 

11. Informal Terms disc (def. 3).
12. to cultivate (soil) with a disk harrow.

Also, disc (for defs. 1, 2, 4–9, 12).

• Latin discus discus; compare dish
• 1655–65

disk′like′, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

disk / dɪsk/ noun

1. a variant spelling (esp US and Canadian) of disc
2. Also called: magnetic disk, hard disk a direct-access storage device consisting of a stack of plates coated with a magnetic layer, the whole assembly rotating rapidly as a single unit. Each surface has a read-write head that can move radially to read or write data on concentric tracks
   See also floppy disk

WordReference Random House Learner's Dictionary of American English © 2026

disc /dɪsk/   n. [countable]

1. Sound Reproduction a phonograph record.
2. Computing disk.

WordReference Random House Unabridged Dictionary of American English © 2026

disc  (disk), n. 

1. Sound Reproduction a phonograph record.
2. Computing disk (defs. 1, 2, 4–9).

v.t. 

3. Sound Reproduction, Informal Terms [Informal.] to make (a recording) on a phonograph disc.
4. disk (defs. 11, 12).

Also, disk (for defs. 1, 3).

• see disk

disc., 

1. discount.
2. discovered.

Collins Concise English Dictionary © HarperCollins Publishers::

disc, disk / dɪsk/ noun

1. a flat circular plate
2. something resembling or appearing to resemble this
3. another word for (gramophone) record
4. any approximately circular flat structure in the body, esp an intervertebral disc
5. the flat receptacle of composite flowers, such as the daisy
6. (as modifier): a disc floret
7. 
   Also called: parking disc a marker or device for display in a parked vehicle showing the time of arrival or the latest permitted time of departure or both
8. (as modifier): a disc zone, disc parking
9. a variant spelling of disk2

Etymology: 18th Century: from Latin discus, from Greek diskos quoit