what is a baseboards
Full Definition of BASEBOARD. : a board situated at or forming the base of something; specifically: a molding covering the joint of a wall and the adjoining floor.See baseboard defined for English-language learners.See baseboard defined for kids. a board situated at or forming the base of something; specifically: a molding covering the joint of a wall and the adjoining floor. See baseboard defined for English-language learners.