1. (n.) The light perceived before the rising, and after the setting, of the sun, or when the sun is less than 18 below the horizon, occasioned by the illumination of the earth's atmosphere by the direct rays of the sun and their reflection on the earth.

2. (n.) faint light; a dubious or uncertain medium through which anything is viewed.

3. (a.) Seen or done by twilight.

4. (a.) Imperfectly illuminated; shaded; obscure.

afterglow alpenglow aurora bad light brown of dusk brownness candlelight candlelighting cocklight crepuscular crepuscule dark darkening darkish darkishness darkling darksome darksomeness dawnlight deadness decay declination decline dim dim light diminution dimming dimness dimpsy downturn drabness dullness dusk duskiness duskingtide duskness dusky ebb end evening evensong eventide first light flatness foredawn gloam gloaming glooming gloomy glow half-light lack of sparkle lackluster lifelessness limbo lusterlessness mat mat finish morning twilight murk murkiness nightfall obscure owllight partial darkness semidark shadowy shady slump somberness sundown sunset sunsetty the small hours twilight zone twilighty vesper vespertine wane waning weakening