Dictionary.com
Thesaurus.com
Synonyms

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.

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sunset

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.