<p><strong>Adjective</strong></p><ul><li>of or relating to pathology, or the science or study of diseases and their causes: Research into the pathological origins of alcoholism is ongoing.</li><li>caused by, indicative of, or involving disease: Her white blood cell count had fallen to a pathological level.</li><li>caused by or evidencing a mentally disturbed condition: He is a pathological hoarder. They show a pathological lack of concern for the suffering of others.</li><li>dealing with diseases: The neurologist kept a pathological casebook from her practice as a source of examples for lectures.</li><li>Mathematics: designating a phenomenon or object, such as a function, that is logically and correctly defined but has counterintuitive or paradoxical properties.</li><li>Computers: relating to or producing a failed outcome or one that is contrary to what was intended or expected: This is just an example of what happens when the algorithm encounters pathological data. A pathological input shouldn't break the algorithm.</li></ul>