/ Dictionary / Index R run-in: Meaning and Definition of Find definitions for: run-in Pronunciation: (run'in"), [key] — n. a quarrel; argument. matter that is added to a text, esp. without indenting for a new paragraph. —adj. added to a text without indenting. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: run-in (Thesaurus) runic Runjeet Singh Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language