/ Dictionary / Index O open-cast: Meaning and Definition of Find definitions for: o•pen-cast Pronunciation: (ō'pun-kast", -käst"), [key] — adj. Brit. Mining. open-cut. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: open-cast (Thesaurus) open call open chain Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language