There was the following quote from Adam B. Schiff, Democrat Representative on President Obama’s request for a formal authorization of Congress to fight the Islamic State in New York Times article (February 10), titled “Obama to seek war bill from Congress to fight ISIS.
“Representative Adam B. Schiff was uncomfortable with much of what he has seen floated, especially the lack of a 2001 repeal. “If you don’t sunset that” he said, “any sunset you put in a new authorization is pretty meaningless because any president can rely on the 2001 authority to claim they have all they need.”
Oxford Advanced Learnner's Dectionary at hand defines 'sunset' simply as a noun meaning 1.(u) the time when the sun goes down and night begins. 2. (c) the colours in the part of the sky where the sun slowly goes down in the evening.
I don’t think I’ve ever seen the case of the word “sunset” being used in tandem in the form of both verb and noun in a line in this way.
Is it common to use “sunset” as a verb to mean (as I take it) “to repeal” or “put something to an end” in this way? What does “sunset” exactly mean here?