/ Dictionary / Index O old-line: Meaning and Definition of Find definitions for: old-line Pronunciation: (ōld'līn'), [key] — adj. following or supporting conservative or traditional ideas, beliefs, customs, etc. long established; traditional: old-line society. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: old-line (Thesaurus) Old Latin Old Line State Related Content Daily Word Quiz: dormant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language