Definition of optical disk
: a disk with a plastic coating on which information (as music, visual images, or computer data) is recorded digitally (as in the form of tiny pits) and which is read by using a laser
First Known Use of optical disk
OPTICAL DISK Defined for English Language Learners
Definition of optical disk for English Language Learners
: a computer disk on which information is recorded in a way that can be read by a laser
Seen and Heard
What made you want to look up optical disk? Please tell us where you read or heard it (including the quote, if possible).