/ Dictionary / Index A afterburner: Meaning and Definition of Find definitions for: af•ter•burn•er Pronunciation: (af'tur-bûr"nur, äf'-), [key] — n. a device placed within, or attached to the exit of, a jet-engine exhaust pipe to produce afterburning. a device for burning exhaust fumes from an internal-combustion engine, as of an automobile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: afterburner (Thesaurus) afterbrain afterburning Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language