/ Dictionary / Index C coopered joint: Meaning and Definition of Find definitions for: coop'ered joint' Pronunciation: [key] — Joinery. a joint made between pieces in a polygonal or curved construction, using either splines or dowels. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cooper City cooperite Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language