Lewis Short
(adjective) : hĭlăris, e, and hĭlărus, a, um, , = ἱλαρός [cf. Sanscr. hlād, rejoice; Gr. χλαρός; Engl. glad]
* Cheerful, of good cheer, lively, gay, blithe, merry, jocund, jovial.—Adj. (class.; syn. laetus).
* Form hilaris: oderunt hilarem tristes tristemque jocosi,Hor. Ep. 1, 18, 89; cf.: hoc (vultu) tristes, hoc hilares sumus,Quint. 11, 3, 72: si tristia dicamus hilares,id. ib. 67: esse vultu hilari atque laeto,Cic. Tusc. 1, 42, 100: hilari animo esse,id. Q. Fr. 2, 13, 1; cf.: aliquem hilari ingenio et lepide accipere,Plaut. Most. 1, 4, 6: ut hunc festum diem Habeamus hilarem,id. Poen. 5, 6, 30: hilarem hunc sumamus diem,Ter. Eun. 4, 5, 5: laetum hilaremque diem sentire,Juv. 15, 41: hilaris fluit (vox),Quint. 11, 3, 63: oratio (opp. tristis),id. 8, 3, 49: causae (opp. tristes),id. 11, 3, 151: adulescentia,id. 8, 6, 27: id quod dicitur aut est lascivum et hilare aut contumeliosum.... In convictibus lasciva humilibus hilaria omnibus convenient,id. 6, 3, 27: infernis hilares sine regibus umbrae,Juv. 13, 52.
* Subst.: hĭlărĭa, ōrum, n., the joyous festival celebrated in honor of Cybele at the vernal equinox, Macr. S. 1, 21: hilaribus,Vop. Aurel. 1: hilariis,Lampr. Alex. Sev. 37.—Adv.: hĭlăre (class.), and hĭlărĭ-ter (late Lat.), cheerfully, gayly, joyfully, merrily: dicimus aliquem hilare vivere, etc.,Cic. Fin. 5, 30, 92; cf.: res tristes remisse, severas hilare tractare,id. de Or. 3, 8, 30; so, hilare,id. ib. 2, 71, 290; Afran. ap. Non. 514, 2; Tac. A. 11, 3; Suet. Ner. 34; Gell. 18, 2, 1: deinde modo acriter, tum clementer, maeste, hilare in omnes partes commutabimus,Auct. Her. 3, 14, 24; 4, 55, 68: hilariter, Aug. Civ. Dei, 5, 26; Vulg. Sap. 6, 17; cf. Neue, Formenl. 2, 660.— Comp.: si hilarius locuti sunt (opp. in luctu esse),Cic. Tusc. 3, 27, 64; Suet. Calig. 18.
* Comp.: fac nos hilaros hilariores opera atque adventu tuo,Plaut. Stich. 5, 4, 56: tu quidem pol et multo hilarior,Ter. Eun. 4, 5, 5: hilarioribus oculis quam solitus eras, intuens,Cic. Pis. 5, 11: attulit a te litteras hilariores,id. Att. 7, 25: hilarior protinus renidet oratio,Quint. 12, 10, 28: cutem in facie corrigit coloremque hilariorem facit,brighter, fresher,Plin. 23, 8, 75, § 144; cf. id. 36, 7, 11, § 55; 16, 10, 19, § 48.
* Sup.: homo lepidissime atque hilarissime!Plaut. Men. 1, 2, 40: conviva,id. Mil. 3, 1, 72.
Charlton T. Lewis, Charles Short, A Latin Dictionary