/ Dictionary / Index P pressure welding: Meaning and Definition of Find definitions for: pres'sure weld"ing Pronunciation: [key] the welding together of two objects by holding them together under pressure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pressure-vacuum valve pressurization Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language