Something that assures a particular outcome or condition, A promise or assurance, especially one given in writing, that attests to the quality or durability of a product or service, One who binds himself to see the stipulations or obligations of another performed; in general, one who is responsible for the performance of some act, the truth of some statement, etc, verb_ To make something certai, make certain of, give surety or assume responsibility, transitive verb_ In law and common usage_ to undertake or engage for the payment of (a debt) or the performance of (a duty) by another person; to undertake to secure (a possession, right, claim, etc) to another against a specified contingency, or in all events; to give a guarantee concerning; to engage, assure, or secure as a thing that may be depended on; to warrant