/ Thesaurus / D Synonyms of date line Find synonyms for: Noun1. dateline, date line, International Date Lineusage: an imaginary line on the surface of the earth following (approximately) the 180th meridianNoun1. dateline, date line, International Date Lineusage: a line at the beginning of a news article giving the date and place of origin of the news dispatchVerb1. dateline, datemark, date-mark, dateusage: mark with a date and place; "dateline a newspaper article"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language