Anterior in position, and prior in time, to a molar, as a tooth; situated in advance of molars; deciduous, as a molar; pertaining in any way to premolars: as, a premolar tooth; premolar dentition; the premolar part of a maxillary bone.n. A milk-molar; a molar of the deciduous dentition; a tooth which in the permanent dentition replaces a milk-molar.