/ Dictionary / Index D disc brake: Meaning and Definition of Find definitions for: disc' brake" Pronunciation: [key] — Auto. Auto. a brake system in which a disc attached to a wheel is slowed by the friction of brake pads being pressed against the disc by a caliper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. discase disc camera Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language