put (something) to rest
1. To stop or finish discussing, thinking about, or focusing on something. OK, I think we have to agree to disagree. Let's just put the issue to rest and stop arguing. Why are you still being so jealous? I thought we'd put this all to rest ages ago.
2. To prove or demonstrate that something is false so as to resolve doubt or uncertainty around it. A: "You know, going out on the town with Andrew isn't going to put the rumors about you two to rest." B: "I don't care what people say about us!"
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