/ Dictionary / Index O open call: Meaning and Definition of Find definitions for: o'pen call' Pronunciation: [key] an audition, esp. for actors or dancers, open to anyone wishing to try out. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. open book open-cast Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language