From WordNet (r) 3.0 (2006):
disk
n 1: something with a round shape resembling a flat circular
plate; "the moon's disk hung in a cloudless sky" [syn:
disk, disc, saucer]
2: a flat circular plate [syn: disk, disc]
3: sound recording consisting of a disk with a continuous
groove; used to reproduce music by rotating while a
phonograph needle tracks in the groove [syn: phonograph
record, phonograph recording, record, disk, disc,
platter]
4: (computer science) a memory device consisting of a flat disk
covered with a magnetic coating on which information is
stored [syn: magnetic disk, magnetic disc, disk,
disc]
v 1: draw a harrow over (land) [syn: harrow, disk]