fămĭlĭārĭtas, ātis, f. [familiaris, II. B. I.], familiarity, intimacy, familiar intercourse, friendship, intimate acquaintance.
I Prop. (freq. and class.; in sing. and plur.; syn.: amicitia, necessitudo, notitia): familiaritas tanta nullo cum hospite ... ut nihil sit familiaritate nostra conjunctius, Cic. Fam. 13, 19, 1; cf.: cum Antipatro Derbete mihi ... summa familiaritas intercedit, id. ib. 13, 73, 2: cum P. Terentio Hispone mihi summa familiaritas consuetudoque est, id. ib. 13, 65, 1: viri boni ... familiaritate conjuncti, id. Off. 1, 17, 55: memorabilis C. Laelii et P. Scipionis, id. Lael. 1, 4: digna mihi res nostrā familiaritate visa est, id. ib.: Verginii familiaritate delector, id. ib. 27, 101: familiaritatem consuetudo affert, id. Deiot. 14, 39: in alicujus familiaritatem venire, id. Fam. 7, 15, 2: in familiaritatem intrare penitus, id. Q. Fr. 1, 1, 5, § 15: se insinuare, id. Caecin. 5, 13: sese dare, id. Verr. 2, 2, 70, § 169: recipere aliquem, id. Phil. 2, 32, 78: ad ali cujus familiaritatem se applicare, id. Clu. 16, 46: versatus in intima familiaritate hominis potentissimi, id. Balb. 26, 58: aliquem familiaritate devincire, id. Q. Fr. 1, 2, 2, § 4 et saep.—In plur.: consuetudines et familiaritates, Cic. Off. 1, 17, 53: inveteratas familiaritates exstinguere (opp.: odia sempiterna), id. Lael. 10, 35: jam a sapientium familiaritatibus ad vulgares amicitias oratio nostra delabitur, id. ib. 21, 76.—
II Transf., in plur. concr. for familiares, intimate acquaintances , friends : omnes amicitias et familiaritates intra breve tempus afflixit, Suet. Tib. 51 fin. —In sing.: e praecipua familiaritate Neronis, Tac. A. 15, 50.