sunset

American  

[suhn-set] / ˈsʌnˌsɛt /

noun

1. the setting or descent of the sun below the horizon in the evening.

2. the atmospheric and scenic phenomena accompanying this.

3. the time when the sun sets.

4. the close or final stage of any period.

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adjective

1. (of an industry, technology, etc.) old; declining.

   sunset industries.

2. of, relating to, or characteristic of a sunset law.

   to add sunset restrictions to a bill.

sunset British  

/ ˈsʌnˌsɛt /

noun

1. the daily disappearance of the sun below the horizon

2. the atmospheric phenomena accompanying this disappearance

3. Also called: sundown.  the time at which the sun sets at a particular locality

4. the final stage or closing period, as of a person's life

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Etymology

Origin of sunset

Middle English word dating back to 1350–1400; see origin at sun, set

Example Sentences

Another concerns so-called "sunrise" and "sunset" clauses under which the EU side of the accord would kick in once the United States makes fully good on its pledges, and would expire unless renewed in 2028.

From Barron's • May 19, 2026

One of the reasons given was opposition to so-called "sunset clauses" which would have allowed some restrictions on Iran to expire over time.

From BBC • May 15, 2026

As solar panels lose their ability to generate electricity after sunset, one major challenge remains for renewable energy: how to store solar power for use later, whether during cloudy weather or overnight.

From Science Daily • May 15, 2026

The exemptions would sunset in 2032 so legislators could review the bill’s effect before deciding whether to enact the policy permanently.

From Los Angeles Times • May 13, 2026

They went over some of the games from Browne’s recent tournaments, although they didn’t play chess, and once took a long walk at sunset to enjoy the spectacular views of the city across the Bay.

From "Endgame" by Frank Brady

Related Words

• dusk
• nightfall
• sundown
• twilight