/ Dictionary / Index C castoff: Meaning and Definition of Find definitions for: cast•off Pronunciation: (kast'ôf", -of", käst'-), [key] — adj. thrown away; rejected; discarded: castoff clothing. —n. a person or thing that has been cast off. the estimate by a compositor of how many pages copy will occupy when set in type. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Castle walk castor Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language