n. The act of warranting or securing; a warrant or surety.n. Specifically, in law, a separate, independent contract by which the guarantor undertakes, in writing, for a valuable consideration, to be answerable for the payment of some particular debt, or future debts, or the performance of some duty, in case of the failure of another person primarily liable to pay or perform. Colebrooke, On Collateral Securities.n. That which guarantees anything; a ground or basis of security: as, constitutional guaranties; his character is guaranty for his assertions; what guaranty have I that you will keep your word?Same as guarantee.