1. (n.)disk any thin, flat, circular plate or object.
2. disk any surface that is flat and round, or seemingly so: the disk of the sun.
3. disk any of several types of media for storing electronic data consisting of thin round plates of plastic or metal: floppy disk; hard disk.
4. disk Bot., Zool. any of various roundish, flat structures or parts.
5. disk the central part of the flower head in composite plants, as the yellow center of the daisy.
6. disk any of the circular steel blades of a disk harrow.
7. disk Archaic.
8. (v.t.)disk to cultivate (soil) with a disk harrow.
Etymology: (1655–65; < L discusdiscus ; cf. dish)
Definition of 'DISK'
Princeton's WordNet
1. (noun)disk, disc, saucer something with a round shape resembling a flat circular plate "the moon's disk hung in a cloudless sky"
2. (noun)disk, disc a flat circular plate
3. (noun)phonograph record, phonograph recording, record, disk, disc, platter 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. (verb)magnetic disk, magnetic disc, disk, disc (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored