An orgy is a party in which people behave in a very uncontrolled way, especially one involving sexual activity. It was reminiscent of a scene from a Roman orgy. ...a drunken orgy. 3 senses: 1. a wild gathering marked by promiscuous sexual activity, excessive drinking, etc 2. an act of immoderate or.... Click for more definitions. ORGY meaning: 1 : a wild party and especially one in which many people have sex together; 2 : something that is done too much and in a wild way often + of Definition of orgy noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.