sunlight /ˈsʌnˌlaɪt/noun 4verb 1forms 3 noun4 •All the electromagnetic radiation given off by the Sun; especially, that in the visible spectrum and that bathes the Earth.Sunlight on the skin gives you vitamin D. •[before a noun] Synonym of photic (“describing that part of the near-surface ocean in which photosynthesis is possible.”). •(figurative) Brightness, hope; a positive outlook. •Synonym of sunrise. verb1 •To work on the side (at a secondary job) during the daytime. formssunlighted · sunlighting · sunlights