• the time of day immediately following sunset

  "he loved the twilight"

  同义词： dusk gloaming gloam nightfall evenfall fall crepuscule crepuscle

• the diffused light from the sky when the sun is below the horizon but its rays are refracted by the atmosphere of the earth
• a condition of decline following successes

  "in the twilight of the empire"

"the twilight glow of the sky"

同义词： dusky twilit