any thin, flat, circular plate or object.

any surface that is flat and round, or seemingly so

the disk of the sun.

disc ( def. 1 ) .

Computers . 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.

Botany, Zoology . any of various roundish, flat structures or parts.

intervertebral disk.

Botany . (in the daisy and other composite plants) the central portion of the flower head, composed of tubular florets.

any of the circular steel blades that form the working part of a disk harrow.

Mathematics . the domain bounded by a circle.

Archaic . discus.

Informal . disc ( def. 3 ) .

to cultivate (soil) with a disk harrow.

noun

circle , disc , discoid , discoidal , discus , dish , flan , plate , platter , quoit , sabot , saucer , shellnotes:some make a distinction between disks - magnetic media like floppy disks and hard disks - and discs , optical media like cd-roms and dvds , band , circuit , gyre , ring , wheel