/ Dictionary / Index O optical computer: Meaning and Definition of Find definitions for: op'tical comput'er Pronunciation: [key] an experimental computer that uses photons rather than electrical impulses to process data a thousand times faster than with conventional integrated circuits. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. optical character recognition optical disk Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language