/ Dictionary / Index P porting: Meaning and Definition of Find definitions for: port•ing Pronunciation: (pôr'ting, pōr'-), [key] — n. Auto., Mach. the changing of the size, shape, or location of the intake and exhaust ports in an internal-combustion engine, generally to improve performance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: porting (Thesaurus) Portinari portion Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language