1. n - The end of a piece of lumber or stick. 2. v - The act of placing two pieces of scenery or material together, e.g., "I need you to butt that platform right up to the flat." 3. adv - A type of wood joinery. See Butt Joint. 4. n - The end of a rifle that goes against your shoulder when firing, e.g., " We need to fix the butt of that rifle; the dancers broke it last night in the Christmas scene." 5. n - A type of single conductor, permanent electrical connector; an insulated metal sleeve with two crimped ends, aka butt splice. Sometimes specified for use in enclosures instead of wire nuts.