Definition of bipolar in English:


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  • 1Having or relating to two poles or extremities.

    ‘a sharply bipolar division of affluent and underclass’
    • ‘The breakdown of the Soviet Union, which formed one of the two poles in the former bipolar world order brought to an end the set of rules that had governed international relations since the end of World War II.’
    • ‘At its heart lie the contention that ‘Bedouin society never changes’ and the bipolar division of history into pre-modern and modern communities.’
    • ‘Extroversion is one pole of the bipolar extroversion-introversion dimension.’
    • ‘The bipolar division of the environment into pure wilderness and impure everything else has deeply compromised environmentalism and sometimes skews environmental history.’
    • ‘At the heart of this burden lies a sort of bipolar personal narrative; the story has a neat division, a before and an after, where the homeland represents an asymptote of fulfillment, a sustaining force in the story.’
    • ‘Weighing these two diametrically opposed reactions, juveniles may be unable to accurately select between two extreme bipolar adjectives to describe themselves through their parents' eyes.’
    • ‘His declaration is directly related to a change in the bipolar model.’
    • ‘It is merely the latest in a series of clashes as the bipolar (West v East) Cold War institutional framework is reshaped by the pressures of today's unipolar (USA rules) world.’
    • ‘This bipolar desire for overwhelming power everywhere while sticking our necks out nowhere is exemplified by the new basing strategy (more to follow on this).’
    • ‘Audiences seemed to emerge with bipolar responses to the movie: either they loved it or were simply baffled, left scratching their heads in anguish over the film's countless conundrums.’
    • ‘Whether it will indeed be called that will become clear on March 10, when Simeon II is expected to announce the coalition that has the potential to shatter the current bipolar model.’
    • ‘Certainly most humans hold complicated and deep-seated views on deceit and candor; Americans, however, seem to have an especially bipolar one.’
    • ‘The absurd oversimplification of a bipolar political model was encouraged by the propaganda excesses of the cold wars but has never really been of much use for understanding the political scene.’
    • ‘In 1991, the bipolar world of U.S.-Soviet domination collapsed.’
    • ‘If they are able in the next municipal and parliamentary elections to hold such a position, this will allow them to block the return of the bipolar structure of the Bulgarian political sphere.’
    • ‘Or perhaps into several camps, but when one is worth more than all the others combined, a more or less bipolar world may be inevitable.’
    • ‘The original moon landing race was a bipolar affair, with America and Russia urgently scrabbling to make space a ‘sphere of influence’.’
    • ‘The previous bipolar world order, based on mutual deterrence between the two superpowers, engendered a sort of mutual neutralisation.’
    • ‘Mick O'Regan: Population increase in certain areas has become characterised by what geographers call bipolar growth.’
    • ‘Under the previous bipolar world order, NATO stood as a counter-pole to the military arm of the Eastern bloc, the Warsaw Pact.’
    1. 1.1Relating to or occurring in both North and South polar regions.
      ‘bipolar species’
      • ‘When our final Guggenheim on this planet opens in 2015 at the North Pole, we will at last have accomplished our goal of being not only global but bipolar.’
      • ‘Recent research on the Antarctic ice core points to the fact that both hemispheres are bound by a 'bipolar seesaw.'’
      • ‘The millennial-scale asynchrony of Antarctic and Greenland climate records during the last glacial period implies that the global climate system acts as a bipolar see-saw driven by either high-latitudinal and/or near-equatorial sea-surface perturbations.’
      • ‘The bipolar climate asynchrony in our scenarios is caused by the toggle between North Atlantic heat piracy and South Atlantic counter heat piracy.’
      • ‘The emerging view of a complex "bipolar climate machinery" urgently calls for a major international research effort to decipher and quantify the interplay of bipolar ice-ocean-atmosphere processes in climate evolution and sea level change during warm and cold climate conditions.’
  • 2(of psychiatric illness) characterized by both manic and depressive episodes, or manic ones only.

    ‘Mania is a component of manic depressive or bipolar disease.’
    • ‘I'm mentally ill with bipolar manic depression illness.’
    • ‘For those of you in the audience with no medical background, frontal lobe syndrome manifests itself in many ways that mimic the manic stage of bipolar disease.’
    • ‘An estimated 10-15 percent of adolescents with recurrent major depressive episodes develop bipolar disorder.’
    • ‘He was discharged with a diagnosis of bipolar affective disorder.’
    • ‘The diagnosis was acute bipolar and schizoaffective disorder.’
    • ‘There's no evidence to tie these events to a bipolar condition, and I haven't noticed bipolar tendencies in Tom.’
    • ‘The boy displayed some symptoms of bipolar disorder.’
    • ‘My sister struggled with severe bipolar illness.’
    • ‘Despite her experiences, she still wouldn't accept treatment for her bipolar diagnosis.’
    1. 2.1(of a person) affected by bipolar disorder.
      ‘She even gave him a short trial of lithium upon deciding he was bipolar.’
      • ‘Two weeks later, I learned I was bipolar too.’
      • ‘Alcoholism among bipolar women, however, did not stem from family lineage.’
      • ‘I think that being bipolar can be an asset for a writer.’
      • ‘She wasn't bipolar, or manic or anything like that.’
      • ‘My dad asked me if I had a choice not to be bipolar, would I take it?’
      • ‘I still feel really horrible sometimes, but I know it's all part of being bipolar.’
      • ‘Are more kids bipolar?’
      • ‘I was diagnosed bipolar in 1984.’
      • ‘How long have you known you were bipolar?’
      • ‘He says he was diagnosed as bipolar.’
      • ‘If I'm bipolar now, will I be bipolar forever?’
      • ‘It has become reasonably well accepted that bipolar patients treated with an antidepressant for a depressive episode can be at risk to ‘switch’ into a manic episode.’
      • ‘I forgive him, knowing he was bipolar, manic depressive, and alcoholic.’
      • ‘Indeed, many bipolar patients report that manic episodes followed a period in which they were unable to sleep or endured jet lag.’
      • ‘Because he was bipolar, you never knew who you were going to get.’
      • ‘Earlier this year, New York magazine asked on its cover: ‘Are you bipolar?’’
      • ‘I have only told the closest friends of my condition, save for a few times when I've met another bipolar person or someone who has actually experienced full-blown panic attacks.’
      • ‘For many bipolar patients, symptoms persist for decades despite multiple medications.’
      • ‘Stressful life circumstances make a bipolar person much more likely to have an episode.’
  • 3(of a nerve cell) having two axons, one either side of the cell body.

    ‘These cells appeared mainly as thin and bipolar cells closely related to the hypertrophic nerve trunks.’
    • ‘Active movement is largely confined to each end of these elongated bipolar cells, enabling them to exert traction on the underlying substratum and to shuffle in between each other, always along the medio-lateral axis.’
    • ‘At goldfish retinal bipolar cells, the calcium requirement for physiological release rates is reported to be >100 M.’
    • ‘Isolated retinal bipolar cells from tiger salamanders act like adaptive filters: at resting potential, their response gain and time constant are maximal, and transfer functions are lowpass.’
    • ‘Most cells were either oval or spindle shaped, with bipolar cell processes.’
    • ‘In past years evanescent wave microscopy was used to study the dynamics of vesicles in endocrine cells and in goldfish bipolar cell terminals.’
    • ‘The central processes of bipolar neurons constitute the auditory component of the eighth cranial nerve, which projects centrally to the cochlear nuclei.’
    • ‘Occasionally, the dorsal bipolar neuron was duplicated.’
    • ‘Some bipolar naked nuclei and rare single intact epithelial cells were seen.’
    • ‘The single SPB that is present at the beginning of the cell cycle must duplicate to generate the two poles of the bipolar spindle.’
  • 4Electronics
    (of a transistor or other device) using both positive and negative charge carriers.

    ‘Thus, positive feedback between two bipolar junction transistors is reduced and then latch-up is eliminated.’
    • ‘A bipolar junction transistor is provided that includes an intrinsic collector region of first conductivity type in a semiconductor substrate.’
    • ‘The differential amplifier further includes a lateral bipolar transistor.’
    • ‘A new design for a high voltage bipolar transistor is disclosed.’
    • ‘Developers of bipolar transistors have long been aware that the current flows must generate some light, comments Russell D. Dupuis of the Georgia Institute of Technology in Atlanta.’
    • ‘Toyota is already the world's largest producer of insulated-gate bipolar transistors, and they are working right now on the fourth generation nickel-hydride battery.’
    • ‘The distal portion of the cut nerve was placed over bipolar platinum electrodes and immersed in liquid paraffin warmed to 37 [degrees] C and contained in a bath that was formed by raising the skin flaps of the wound.’



/bīˈpōlər/ /baɪˈpoʊlər/