Lewis & Short

cīvīlĭtas, ātis, f. [civilis].

  1. I. (Acc. to civilis, I. B.) The art of government, politics, only three times in Quint. as transl. of the Gr. πολιτική, 2, 15, 25; 2, 15, 33; 2, 17, 14.
  2. II. (Acc. to civilis, II.) Courteousness, politeness, affability (post-Aug. and rare), Suet. Aug. 51; id. Claud. 35; Eutr. 7, 21; Lampr. Alex. Sev. 20.