twilight

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 this 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.

To illuminate faintly.

Pertaining to or resembling twilight; faintly illuminated; obscure.