noun

1. The light from the Sun, as opposed to that from any other source.

2. A light source that simulates daylight.

3. (photometry) The intensity distribution of light over the visible spectrum generated by the Sun under various conditions or by other light sources intended to simulate natural daylight.

Synonyms: dayspring, sunrise, sunlight, sunshine, daytime

verb

1. To expose to daylight

2. To provide sources of natural illumination such as skylights or windows.

3. To allow light in, as by opening drapes.