n.

1. 日落，日落时间[U]
   They stopped work at sunset.

   他们日落而息。

   It is seen in the sky after sunset.

   日落后可在天空中看到它。

2. 日落的景象[C]
   You must really see some golden sunsets here.

   你一定得看看这里金色的夕照。

   The old man sat watching the sunset.

   老人坐看日落。

3. 西方[U]
4. 末尾；晚年，衰退期[C][U]
   He is now in the sunset of his day.

   他已步入晚年。

n.

1. the time in the evening when the sun sets.
   ▸the colours and light visible in the sky at sunset.
2. the final declining phase of something.
3. [as modifier] N. Amer. denoting a clause or provision under which an agency or programme is to be disbanded or terminated at the end of a fixed period unless it is formally renewed.