/ Dictionary / Index O open dating: Meaning and Definition of Find definitions for: o'pen dat'ing Pronunciation: [key] the practice of putting a freshness date on food packages. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. open-cut open diapason Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language