/ Dictionary / Index P percussion welding: Meaning and Definition of Find definitions for: percus'sion weld"ing Pronunciation: [key] a form of resistance welding in which the required pressure is provided by a hammerlike blow. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. percussion lock percussive Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language