That part of either morning or evening twilight between complete darkness and civil twilight.
(adj.) the beginning of darkness in the evening
The time of day immediately following sunset.
(as used by sunPATH) (Twilight) The evening period of waning light between Sunset and dark, when the Sun is below the horizon. sunPATH calculates the approximate point in time when there should be enough light from the sky for an exposure at T1.3, 500ASA, 24fps (1/48sec). This is considered by some as “Magic Hour.” Terrain features and weather conditions can limit the available skylight. (This is not astronomical, civil or nautical twilight.)
The part of morning or evening twilight between complete darkness and civil twilight (i.e., the combined nautical and astronomical twilights). In nontechnical usage, dusk is the evening counterpart of dawn. In technical usage, morning dusk is the first part of dawn.
The period of waning light from the time of sunset to dark.