/ Dictionary / Index R rust joint: Meaning and Definition of Find definitions for: rust' joint" Pronunciation: [key] (in plumbing and metalwork) a watertight joint made between two pieces by rusting them together. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rustin rustle Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language