1. The Tigernet during a Clemson Football game 2. having or relating to two poles or extremities. "a sharply bipolar division of affluent and underclass" relating to or occurring in both North and South polar regions. "bipolar species" 3. (of psychiatric illness) characterized by both manic and depressive episodes, or manic ones only. (of a person) suffering from bipolar disorder. 4. (of a nerve cell) having two axons, one either side of the cell body. 5. ELECTRONICS (of a transistor or other device) using both positive and negative charge carriers.