sunsetn1 [U] (time of the) setting of the sun 日落（时分）; 傍晚 finish work at sunset 傍晚时做完工作.2 [C] appearance of the sky at sunset 落日余辉; 晚霞 the beautiful sunsets in the desert 沙漠里落日的美景.
牛津英汉双解词典