Definition of Fianza
Sp. In Spanish law, trust, confidence, and correlatively a legal duty or obligation arising therefrom. The term is sufficiently broad in meaning to include both a general obligation and a restricted liability under a single instrument. But in a special sense, it designates a surety or guarantor, or the contract or engagement of suretyship; the contract by which one person engages to pay the debt or fulfil the obligations of smother if the latter should fail to do so.
That's the definition of Fianza in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.