obligation Copy link Outline I. Binding moral force1. offĭcium2. expr. by ŏportet, dēbeo (to be under an o.3. expr. by relĭgio (scrupulousness, conscientious regard)II. A legal undertakingIII. A claim arising out of a favour conferredIV. The favour itself • obligation: I. Binding moral force: 1. offĭcium: cf. Cic. Att. 16, 11, 3, non dubito quin καθῆκον officium sit, sed inscriptio plenior de officiis (i. e. the entire subject of moral o.): cf. id. Off. 1, 2, 7, sqq. 2. expr. by ŏportet, dēbeo (to be under an o.: foll. by infin.): v. ought. 3. expr. by relĭgio (scrupulousness, conscientious regard): to be influenced by the o. of an oath, religione jurisjurandi commoveri, Cic. Font. 9, 20: cf. Caes. B. C. 1, 77, fin. II. A legal undertaking: oblĭgātio: to contract an o., obl. contrahere, Gai. Dig. 44, 7, init.: to cancel an o., obl. tollere, Ulp. Dig. 46, 4, 8 § 3. To lay oneself under o., se obligare: Cic.: Liv.: v. to bind (II., fin.). Fig.: under an o. to pay a vow, voti reus, Virg. Aen. 5, 237: Macr. III. A claim arising out of a favour conferred: Phr.: (i). under an o. to any one: (1). obnoxius (with dat. of person to whom): all Greece was under o. to the Romans for its freedom, omnem Graeciam beneficio libertatis obn. Romanis esse, Liv. 35, 31, med.: Ter. (2). oblĭgātus (v. infr. ii.): I was under no o. to him, nihil ei obl. eram, Cic. Fam. 6, 11: comp. obligatior, under greater o., Plin. Ep. 8, 2, fin. (3). officio obstrictus: Caes. B. G. 1, 9: v. infr. (ii.) to lay anyone under o.: (1). oblĭgo, 1: be sure and lay him under an o. by your liberality, quem fac ut tua liberalitate tibi obliges, Cic. Q. Fr. 2, 14, fin.: Plin. min.: v. to oblige. (2). obstringo, nxi, ctum, 3: to lay any one under an o. by gifts, donis aliquem obs., Cic. Clu. 66, extr. (3). dēmĕreor, 2 (to deserve well of: with acc. of person): to lay a community under o., civitatem beneficio d., Liv. 3, 18, init.: also in act. form, Ov. A. A. 252 (nec tibi sit servos demeruisse pudor). IV. The favour itself: bĕnĕfĭcium, (quod) gratum (est): v. favour. See also to oblige.