Bipolar may refer to:

Astronomy

* Bipolar nebula, a distinctive nebular formation * Bipolar outflow, two continuous flows of gas from the poles of a star

Mathematics

* Bipolar coordinates, a two-dimensional orthogonal coordinate system * Bipolar set, a derivative of a polar set * Bipolar theorem, a theorem in convex analysis which provides necessary and sufficient conditions for a cone to be equal to its bipolar

Medicine

* Bipolar disorder, a mental disorder that causes periods of depression and periods of elevated mood ** Bipolar I disorder, a bipolar spectrum disorder characterized by the occurrence of at least one manic or mixed episode ** Bipolar II disorder, a bipolar spectrum disorder characterized by at least one episode of hypomania and at least one episode of major depression ** Bipolar disorder not otherwise specified, a diagnosis for bipolar disorder when it does not fall within the other established sub-types * Bipolar neuron, a type of neuron which has two extensions

Music

Albums

* Bipolar (Up Dharma Down album), ''Bipolar'' (Up Dharma Down album), 2008 * Bi-Polar (Vanilla Ice album), ''Bi-Polar'' (Vanilla Ice album), 2001 * ''Bipolar'', a 2009 album by rock group El Cuarteto de Nos * ''Bipolar'', a 2019 EP by American singer-songwriter Yot Club

Songs

* Bipolar (Peso Pluma song), "Bipolar" (Peso Pluma song), 2023 *"Bipolar", a song by Blonde Redhead from their 1997 album ''Fake Can Be Just as Good'' * "Bipolar", a song by Gloria Trevi from her 2013 album De Película (Gloria Trevi album), ''De Película'' * "Bipolar", a song by Gucci Mane from his 2018 album ''Evil Genius (album), Evil Genius'' *"Bipolar", a 2019 song by Kiiara *"Bi Polar", a 2021 song by Bhad Bhabie *"Bye Bipolar", a song by Brandy Norwood, Brandy from ''B7 (album), B7'', 2020

Technology

* Bipolar electricity transmission, using a pair of conductors in opposite polarity * Bipolar encoding, a type of line code where two nonzero values are used ** Bipolar violation, a violation of the bipolar encoding rules * Bipolar electric motor, an electric motor with only two poles to its stationary field ** Bipolar (locomotive), a locomotive using a bipolar electric motor * Bipolar signal, a signal that may assume either of two polarities, neither of which is zero * Lithic reduction#Bipolar percussion, Lithic reduction: Bipolar percussion (archaeology)

Transistors

* Bipolar junction transistor (BJT) * Heterojunction bipolar transistor (HBT) * Insulated-gate bipolar transistor (IGBT)

Other uses

* Bipolarisation or Bipolarity, Polarity in international relations#Bipolarity, polarity in international relations involving two states