sunset

Adjective

• providing for termination
  • a program with a sunset provision
    

• of a declining industry or technology
  • sunset industries
    

Noun

• the daily event of the sun sinking below the horizon

• atmospheric phenomena accompanying the daily disappearance of the sun

• the time in the evening at which the sun begins to fall below the horizon

Related words

• Synonyms: 
  sunset(a) , sundown