unipolarPronunciation: /juːnɪˈpəʊlə/Definition of unipolar adjective 1having or relating to a single pole or kind of polarity:a unipolar magnetic charge Electronics (of a transistor or other device) using charge carriers of a single polarity. 2(of psychiatric illness) characterized by either depressive or manic episodes but not both. 3(of a nerve cell) having only one axon or process. Derivatives unipolarityPronunciation: /-ˈlarɪti/ noun unipolar in other Oxford dictionaries Definition of unipolar in the US English dictionary