Intelligence, cleverness.
The quality of being bright.
The perceived luminance of an object.
Tending to darkness or blackness; moderately dark or black; dusky.
To begin to lose light or whiteness; to grow dusk.
To make dusk.
A darkish colour.
The condition of being dusky; duskiness
A period of time at the end of day when the sun is below the horizon but before the full onset of night, especially the darker part of twilight.