early 14c. (late 12c. as a surname), joynour "maker of furniture, small boxes, etc.," from Old French joigneor "joiner, carpenter," agent noun from joindre "to join" (see join (v.)). A craftsman in wood who did lighter and more ornamental work; often meaning the carpenter who does the internal and external finishings of a house, ship, etc. Meaning "one who makes a habit of joining" (societies, clubs, etc.) is from 1890. Related: Joinery.