† oneˈrationObs.rare. [n. of action f.prec.: cf.med.L. onerātio (14th c. in Du Cange).] The action of loading or burdening; loading or filling the stomach, taking of food. 1651Hobbes Leviath. i. vi. 25 Of this Kind are all Onerations and Exonerations of the body.1658Phillips, Oneration, a loading or burthening. In Bailey, Johnson, and in mod. Dicts.