Lewis & Short

extrānĕus, a, um, adj. [extra], that is without, external, extraneous, strange, foreign (mostly post-Aug.; syn.: peregrinus, alienus, adventicius, externus).

  1. I. In gen.: causa, Auct. Her. 3, 2, 2: cognomen, id. ib. 4, 31, 42.
  2. II. In partic., with respect to one’s family, strange, not related, foreign.
    Esp.
    1. A. Leg. t. t.: heredes extranei, not of one’s blood or household: ceteri, qui testatoris juri subjecti non sunt, extranei heredes appellantur, Gai. Inst. 2, 161; Dig. 45, 3, 11 et saep.
    2. B. Subst.: extrānĕus, i, m., a stranger: ut non tam in extraneum translatum quam in familiam reversum videretur, Just. 1, 10: filiam extraneorum coetu prohibere, Suet. Aug. 69; id. Claud. 4 fin.: finis vitae ejus nobis luctuosus, amicis tristis, extraneis etiam ignotisque non sine cura fuit, Tac. Agr. 43; id. A. 4, 11; Plin. 28, 4, 7, § 39; Vulg. Psa. 68, 9 al.
      Hence, adv.: extrā-nĕe, strangely, impertinently: definire, Boëth. Arist. Top. 1, 14.