joiner UK /ˈd͡ʒɔɪnə/US /ˈd͡ʒɔɪnɚ/ noun5 •A maker of wooden furniture or fittings. •A person who joins societies or organizations.I am not a joiner. I am reluctant to sign up as a member of any organization, because I generally can't find myself or my ideas in it. — 2004 •(historical) Synonym of hensopper. •A woodworking machine used to prepare edges of wooden elements to join to other wood pieces. •A thing that joins two separate items, e.g. software to connect video or music clips. formsjoiners