twilight /ˈtwaɪˌlaɪt/noun 5adjective 2verb 1forms 4phrases 3 noun5 •The soft light in the sky seen before the rising and (especially) after the setting of the sun, occasioned by the illumination of the earth’s atmosphere by the direct rays of the sun and their reflection on the earth.I could just make out her face in the twilight. •The time when said light is visible; the period between daylight and darkness.It was twilight by the time I got back home. •The time when the sun is less than 18° below the horizon. •Any faint light through which something is seen.Two women, Eusabio’s wife and sister, looked on from the deep twilight of the hut. — 1927 •(figurative) An in-between or fading condition through which something is perceived., Book IV, Chapter XIV The twilight […] of probability. adjective2 •Pertaining to or resembling twilight; faintly illuminated; obscure. •Synonym of mesopelagic (“Describing the pelagic zone of the ocean between the photic epipelagic and the aphotic bathypelagic zones, characterized by very minimal light.”) verb1 •(literary) To illuminate faintly. formstwilighted · twilit · twilighting · twilights Phrases with twilight twilight industryAn industry that is fading away, perhaps because replaced by newer technology, or facing a lack of critical resources or a lack of consumer interest. twilight yearsOld age. twilight zoneA moving line that divides the daylit side and the dark night side of a planetary body.