What is Warrant?
Warrant is (noun) an official document from a court giving someone permission to do something The magistrate issued a warrant for her arrest. (verb) 1. to state definitely that something is of good quality and that it will work properly All the spare parts are warranted for six months. 2. to be a good reason for Our sales in France do not warrant six trips a year to Paris by the director.
source: Easier English, Student Dictionary Upper Intermediate Level