Of the day, a part of the day, the sky, etc.: illuminated by the sun (or moon). Frequently with reference to the dawn, sometimes with non-referential…

Of a room or other place: well-lit, esp. with natural light; having a considerable or sufficient amount of light; (in early use with stronger sense)…

Of a room, area, etc.: fully or adequately illuminated; provided with ample or sufficient lighting; = well-lit, adj. 2.

Of a room, area, etc.: fully or adequately illuminated; provided with ample or sufficient lighting.

With participles, forming adjectives with the sense ‘that is brightly ——’, as in bright-burning, bright-lit, bright-shining, etc. Now chiefly literary…