mainly US and Canadian the act or an instance of applying a sunset clause
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use sunsetting in a sentence
But the Federal Renewable Electricity Production Tax Credit is in danger of sunsetting at the end of this year.
Its shady bowers and pleasant walks made it a delightful place of resort,—especially toward the time of sunsetting.Charles Duran | The Author of The Waldos
And they rode all that day, and about the time of the sunsetting came to the side of a lake, where was a great dun.The Works of Robert Louis Stevenson, Volume XXI | Robert Louis Stevenson
Bum-boats selling goods before sunrising and after sunsetting are very hardly dealt with.
The boy promised that he would be sure to meet him at the place about sunsetting.The Haunters & The Haunted | Various
No matter what the anguish that it cost thee, from sunrise to sunsetting thou hast held Despair at bay.The Jester's Sword | Annie Fellows Johnston