/ ˈsʌnset; NAmE / noun , adjective , verb
■ noun
1.
[ U ] the time when the sun goes down and night begins :
Every evening at sunset the flag was lowered.
2.
[ C ] the colours in the part of the sky where the sun slowly goes down in the evening :
a spectacular sunset
3.
[ C ] a fixed period of time after which a law or the effect of a law will end :
There is a five-year sunset on the new tax.
■ adjective [ only before noun ]
1.
used to describe a colour that is like one of the colours in a sunset :
sunset yellow
2.
used to describe sth that is near its end, or that happens at the end of sth :
This is his sunset tour after fifty years as a singer.
3.
( of a law or the effect of a law ) designed to end or to end sth after a fixed period of time :
a two-year sunset clause in the new law
■ verb
( -tt- ) [ v , vn ] ( of a law or the effect of a law ) to end or to end sth after a fixed period of time :
The tax relief will sunset after a year.