- the daily disappearance of the sun below the western horizon
- the varying time of this
- the atmospheric phenomena at this time; esp., the color of the western sky at sunset
- the final phase or decline (of a period)
Origin of sunsetMiddle English sunne set, sonsette: see sunrise
- ☆ designating or of a law, bill, etc. requiring that certain government agencies, programs, etc. come to an end after a specified period unless they get legislative approval again
- designating an industry that is in a final state of decline, as because of a diminished use of its products or an inability to meet foreign competition
- The event or time of the disappearance of the upper circumferential edge of the sun as it sets below the horizon.
- The sky as the sun sets: a rosy sunset.
- A decline or final phase: the sunset of an empire.
- 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.
verbsun·set·ted, sun·set·ting, sun·sets Law
Origin of sunsetAdj. and v., on the model of sunshine (as in sunshine law).
- The time of day when the sun disappears below the western horizon.
- The changes in color of the sky at sunset.
- (figuratively) The final period of the life of a person or thing.
- one's sunset years
- Having a set termination date.
- The tax increase legislation included a sunset clause requiring renewal to prevent the tax increase from expiring.
- The region where the sun sets; the west.
(third-person singular simple present sunsets, present participle sunsetting, simple past and past participle sunsetted)
- (business, politics) To phase out.
- We'll be sunsetting version 1.9 of the software shortly after releasing version 2.0 next quarter.