English Proper noun Spanish Inquisition (historical) An extension of the Papal Inquisition, established in 15th-century Spain to investigate and punish converted Jews and Muslims thought to be insincere. (figuratively) Excessive questioning or interrogation. I agreed to answer a few questions, but I didn't expect the Spanish Inquisition. See also third degree Further reading Spanish Inquisition on Wikipedia.Wikipedia Wikiwand - on Seamless Wikipedia browsing. On steroids.