/ Dictionary / Index A after-run: Meaning and Definition of Find definitions for: af•ter-run Pronunciation: (af'tur run", äf'-), [key] — n. the continued running of an internal-combustion engine after the ignition is switched off:Also called Heavy carbon buildup can cause annoying engine after-run. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. afterpiece aftersensation Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language