Relating to or characteristic of a father or fatherhood; fatherly.
Received or inherited from a father: a paternal trait.
Related through one's father: my paternal aunt.
[Middle English, from Old French, from Late Latin paternālis, from Latin paternus, from pater, father; see pəter- in Indo-European roots.] pa·ter'nal·ly adv.
c.1433, from O.Fr. paternal "of a father" (12c.), from M.L. paternalis, from L. paternus "of a father," from pater (see father). Paternalism "government as by a father over his children" is first recorded 1881; paternalistic was in use by 1890.