sunset

sun‧set /ˈsʌnset/ BrE AmE noun
1. [uncountable] the time of day when the sun disappears and night begins
at sunset
We take the flag down at sunset.
2. [uncountable and countable] the coloured part of the sky where the sun is disappearing at the end of the day ⇨ dusk:
a glorious sunset

Oxford Advanced Learner's Dictionary

sunset

sun·set [sunset sunsets] noun, adjective, verb [ˈsʌnset] [ˈsʌnset]

noun
1. uncountable the time when the sun goes down and night begins

• Every evening at sunset the flag was lowered.

2. countable the colours in the part of the sky where the sun slowly goes down in the evening

• a spectacular sunset

3. countable 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.
Example Bank:
• The trees were black against the sunset.
• They sat in the last glow of the sunset.
• We walked along the beach at sunset.
• a beautiful sunset over the bay
• After sunset the temperature drops.
• At the end he gets back on his horse and rides off into the sunset.

• We sat by the river and watched the sunset.

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

Cambridge Advanced Learner's Dictionary

Cambridge Advanced Learner's Dictionary - 4th Edition

sunset / ˈsʌn.set / noun

B1 [ U ] the time in the evening when you last see the sun in the sky:

The fishermen set out at sunset for a night's fishing.

B1 [ C ] the appearance of the sky in the evening before the sun goes down:

We sat on the beach watching a spectacular sunset.

Collins COBUILD Advanced Learner’s English Dictionary

sunset

/sʌnset/
(sunsets)

1.
Sunset is the time in the evening when the sun disappears out of sight from the sky.
The dance ends at sunset.
≠ sunrise
N-UNCOUNT

2.
A sunset is the colours and light that you see in the western part of the sky when the sun disappears in the evening.
There was a red sunset over Paris.
≠ sunrise
N-COUNT

Merriam-Webster's Advanced Learner's Dictionary

Merriam-Webster's Advanced Learner's Dictionary:

sunset
sun·set /ˈsʌnˌsɛt/ noun, pl -sets
1 [noncount] : the time when the sun goes below the horizon in the evening
• We arrived just before sunset. [=(chiefly US) sundown]
• Prayers begin at sunset.
• We worked from sunrise to sunset.
2 : the colors that are in the sky when the sun slowly goes below the horizon