/ Dictionary / Index I International Date Line: Meaning and Definition of Find definitions for: In'terna'tional Date' Line" Pronunciation: [key] a theoretical line following approximately the 180th meridian, the regions to the east of which are counted as being one day earlier in their calendar dates than the regions to the west. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. International Court of Justice Internationale* Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language