disk
disk / disk/ (also disc) • n. 1. a flat, thin, round object: heavy metal disks the size of hockey pucks | onion soup ladled over a disk of cheese. ∎ an information storage device for a computer in the shape of a round flat plate that can be rotated to give access to all parts of the surface. The data may be stored either magnetically (in a magnetic disk) or optically (in an optical disk such as a CD-ROM). ∎ (disc) short for compact disc. ∎ (disc) dated a phonograph record. ∎ (discs) one of the suits in some tarot packs, corresponding to coins in others.2. a shape or surface that is round and flat in appearance: the smudged yellow disk of the moon.3. a roundish, flattened part in an animal or plant, in particular: ∎ (disc or in·ter·ver·te·bral disc) a layer of cartilage separating adjacent vertebrae in the spine: he suffered a prolapsed disc. ∎ Bot. (in a composite flowerhead of the daisy family) a close-packed cluster of disk florets in the center, forming the yellow part of the flowerhead.• v. [trans.] cultivate (a field) with a disk harrow.DERIVATIVES: disk·less adj.