grind to a halt | come to a grinding haltidiomPart ofgrindgrind to a halt | come to a grinding haltgrind to a halt | come to a grinding halt — idiomidiom1. To slow down gradually and then stop completely.1.idiomDefinitionTo slow down gradually and then stop completely.ExampleThe old car ground to a halt on the steep hill.Negotiations came to a grinding halt after the disagreement.