ălĭēnātĭo (noun F) : alieno.
* Act., the transferring of the possession of a thing to another, so as to make it his property: Alienatio tum fit, cum dominium ad alium transferimus,Dig. 18, 1, 67; Sen. Ben. 5, 10. So, alienatio sacrorum, a transfer of the sacred rites (sacra) of one family (gens) to another, Cic. Or. 42, 144; so id. Leg. 3, 20, 48.
* Neutr., the transferring of one's self, i. e. the going over to another; hence
* Trop., a separation, desertion, aversion, dislike, alienation (the internal separating or withdrawing of the feeling of good-will, friendship, and the like; while disjunctio designates merely an external separation): tuam a me alienationem commendationem tibi ad impios cives fore,Cic. Phil. 2. 1: alienatio consulum,id. Q. Fr. 1, 4: alienatio disjunctioque amicitiae,id. Lael. 21, 76: alienatio exercitūs (opp. benevolentia),Caes. B. C. 2, 31: in Vitellium alienatio,Tac. H. 2, 60: alienatio patrui,id. A. 2, 43: Numquid non perditio est iniquo, et alienatio operantibus injustitiam,Vulg. Job, 31, 3.
* In medic. lang.: alienatio mentis,aberration of mind, loss of reason, delirium,Cels. 4, 2; so Plin. 21, 21, 89, § 155: continua,Dig. 1, 18, 14; also without mentis: alienatio saporque,Sen. Ep. 78: alienationis in commoda, Firm. 4, 1.

s. TLL