definition of
disk

[1] #1 disk n. [disc, saucer] something with a round shape resembling a flat circular plate; "the moon's disk hung in a cloudless sky". wn

[2] #2 disk n. [disc] a flat circular plate. wn

[3] #3 disk v. [harrow] draw a harrow over (land). wn

[4] #4 disk n. [phonograph record, phonograph recording, record, 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. wn

[5] #5 disk n. [magnetic disk, magnetic disc, disc] (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored. wn