disk

(also disc)

/dɪsk/ n [C]

Definition

› a flat, circular object: The dog’s name is on a metal disk attached to its collar. › A disk is also a small piece of cartilage (= strong, elastic body tissue) between the bones of a person’s back. › A disk is also a flat, circular device that has a magnetic covering and is used for storing computer information: a hard disk

(Definition of disk n from the Cambridge Academic Content Dictionary © Cambridge University Press)