twilight -- (the diffused light from the sky when the sun is below the horizon but its rays are refracted by the atmosphere of the earth)
twilight -- (a condition of decline following successes; "in the twilight of the empire")
Overview of adj twilight
The adj twilight has 1 sense
dusky, twilight, twilit -- (lighted by or as if by twilight; "The dusky night rides down the sky/And ushers in the morn"-Henry Fielding; "the twilight glow of the sky"; "a boat on a twilit river")