/ Dictionary / Index T tail cone: Meaning and Definition of Find definitions for: tail' cone" Pronunciation: [key] — Rocketry. Rocketry. a cone-shaped component at the rear of a jet engine, rocket, or missile, usually serving as an exhaust pipe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tail coat tail covert Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language