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sunset

Listen/ˈsʌnˌsɛt/

noun

The time of day when the sun disappears below the western horizon.
Example:
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The changes in color of the sky at sunset.
Example:
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The final period of the life of a person or thing.
Example: one's sunset years
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Having a set termination date.
Example: The tax increase legislation included a sunset clause requiring renewal to prevent the tax increase from expiring.
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The region where the sun sets; the west.
Example:
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verb

To phase out.
Example: We'll be sunsetting version 1.9 of the software shortly after releasing version 2.0 next quarter.
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