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1. The daily event of the sun sinking below the horizon
    
2. The time in the evening at which the sun begins to fall below the horizon
   - sundown
    
3. Atmospheric phenomena accompanying the daily disappearance of the sun

1. Of a declining industry or technology
   "sunset industries"
    
2. Providing for termination
   "a program with a sunset provision"

Derived forms: sunsets

See also: last, old

Type of: atmospheric phenomenon, hour, periodic event, recurrent event, time of day

Antonym: dawn

Part of: eve, even, evening, eventide

Encyclopedia: Sunset, TX