οἰκειότης · oikeiotēs — LSJ
a being οἰκεῖος, kindred, relationship, intimacy, friendship
a being οἰκεῖος (signf. II), kindred, relationship, Hdt. 6.54, Th. 3.86, etc. ; intimacy, friendship, φιλία καὶ οἰ. Id. 4.19, cf. Pl. Smp. 197d : pl., And. 1.118, D. 18.35, SIG 557.35 (iii B. C.).
b connexion
metaph., connexion of things, Pl. R. 537c, M.Ant. 4.4, etc.
2 living together as man and wife, domesticity, marriage
living together as man and wife, domesticity, marriage, τῆς Ἑλένης Isoc. 10.42, cf. Lys. 1.6 ; εἰς οἰκειότητα καὶ παιδοποιίαν ὁρᾷ Chor. in Hermes 17.215.
II proper sense
of words and phrases, proper sense, opp. μεταφορά, Plu. Cic. 40, in pl.
III conformity to nature, environment
conformity to nature or environment, Epicur. Sent. 40, Frr. 197,217.