serēnus adj.
2 SER-, clear, fair, bright, serene : tempestate serenā, Enn. ap. C.: caelo sereno, V., H., O.: lux, L.: Faciem ad serenam mutatur dies, Ph.: ver, V.: stella, O.: unde serenas Ventus agat nubīs, V.—As subst n., a clear sky, fair weather : sereno, in a cloudless sky , L.: soles et aperta serena, V.—Fig., cheerful, glad, joyous, tranquil, bright, serene : Voltus, H.: frons: animus, O.: aliquid serenum videre, O.