tongue and groove joint tongue • tongue-and-groove joint · · · Info · Definitions · Characters · · tongue and groove joint · · Text Common · · Latin · · Scripts 23 · · Length 5 · · Syllables Definitions · · · (noun) a mortise joint made by fitting a projection on the edge of one board into a matching groove on another board. Synonyms: tongue and groove joint. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 j latin small letter j U+006A n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076