The time just after sunset, when the light is half-faded, but the world is not yet totally dark, is twilight . If you are between two states, like asleep and awake, that can also be called a twilight moment. TWILIGHT meaning : 1 : the light from the sky at the end of the day when night is just beginning; 2 : the period when day is ending and night is beginning often used before another noun 6 meanings : 1. the soft diffused light occurring when the sun is just below the horizon, esp following sunset Related.... Click for more definitions. Twilight definition : the soft, diffused light lights from the sky when the sun is below the horizon, either from daybreak to sunrise or, more commonly, from sunset to nightfall.. See examples of TWILIGHT used in a sentence.