Sundown vs. Sunset

Sundown and Sunset Definitions
Sundown
The time of sunset.
Sunset
The event or time of the disappearance of the upper circumferential edge of the sun as it sets below the horizon.
Sundown
(US) Sunset.
We'll meet by the pier at sundown.
Sunset
The sky as the sun sets
A rosy sunset.
Sundown
(countable) A hat with a wide brim to shade the eyes from sunlight.
Sunset
A decline or final phase
The sunset of an empire.
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Sundown
To experience an episode or an onset of some detrimental mental condition like agitation, anxiety, hallucination or dementia, daily at nightfall.
Sunset
(Law) The automatic expiration of a statutory provision on a previously established date, in the absence of reauthorization
The law's sunset was July 1.
Sundown
The setting of the sun; sunset.
Sunset
(Law) Providing for an automatic expiration.
Sundown
A kind of broad-brimmed sun hat worn by women.
Sunset
To expire on a previously established date, as a statutory provision.
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Sundown
The time in the evening at which the sun begins to fall below the horizon
Sunset
To provide for the expiration of (a program or agency) by means of a sunset provision.
Sunset
The moment each evening when the sun disappears below the western horizon.
At sunset
Sunset
The changes in color of the sky before and after sunset.
Sunset
(figuratively) The final period of the life of a person or thing.
One's sunset years
Sunset
(attributively) A set termination date.
The tax increase legislation included a sunset clause requiring renewal to prevent the tax increase from expiring.
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Sunset
The region where the sun sets; the west.
Sunset
To phase out.
We’ll be sunsetting version 1.9 of the software shortly after releasing version 2.0 next quarter.
Sunset
The descent of the sun below the horizon; also, the time when the sun sets; evening. Also used figuratively.
'T is the sunset of life gives me mystical lore.
Sunset
Hence, the region where the sun sets; the west.
Sunset
The time in the evening at which the sun begins to fall below the horizon
Sunset
Atmospheric phenomena accompanying the daily disappearance of the sun
Sunset
The daily event of the sun sinking below the horizon
Sunset
Of a declining industry or technology;
Sunset industries
Sunset
Providing for termination;
A program with a sunset provision