/ Dictionary / Index P porthole die: Meaning and Definition of Find definitions for: port'hole die" Pronunciation: [key] — Metalworking. Metalworking. a die having several openings for the extrusion of separate parts of an object later formed by the welding or fusing together of these parts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. porthole Port Hudson Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language