Definition of: twilight

(twī′līt′) noun
1. The light diffused over the sky after sunset and before sunrise (especially, in popular use, the former) which is caused by the reflection of sunlight from the higher portions of the atmosphere.
2. Any faint light; shade; obscurity: the twilight of the groves.
3. Indistinct apprehension or perception: the twilight of doubt or barbarism.
4. A hazy or obscure condition following the waning of past glory, achievements, etc.: the twilight of the gods.
—adjective
1. Pertaining or peculiar to twilight; crepuscular.
2. Imperfectly or faintly lighted; shaded; dim. [ME twyligt <OE twi- (<twa two) + LIGHT; used in sense of “the light between the two,” i.e., between day and night]