bipolar disorder

noun

: any of several psychological disorders of mood characterized usually by alternating episodes of depression and mania

called also bipolar illness, manic depression

Examples of bipolar disorder in a Sentence

Recent Examples on the Web
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Love was killed after police responded to a 911 call from her mother, Jeffry, who told a dispatcher her daughter had bipolar disorder and was suicidal. — Russell Lissau, Chicago Tribune, 27 Oct. 2026 My wife suffers from treatment-resistant depression and/or bipolar disorder. — R. Eric Thomas, Washington Post, 25 Oct. 2026 People with circadian depression were also more likely to report a bipolar disorder diagnosis and to meet criteria for atypical depression, a type marked in part by sleeping too much and weight gain, says Kruse. — Tom Gavin, EverydayHealth.com, 21 Oct. 2026 In 2014, the former Disney star entered a mental health facility shortly after she was diagnosed with lupus and later revealed she had been diagnosed with bipolar disorder. — Lauryn Overhultz, FOXNews.com, 19 Oct. 2026 See All Example Sentences for bipolar disorder

Word History

First Known Use

1972, in the meaning defined above

Time Traveler
The first known use of bipolar disorder was in 1972

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Cite this Entry

“Bipolar disorder.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bipolar%20disorder. Accessed 31 Oct. 2026.

Kids Definition

bipolar disorder

noun
: any of several psychological disorders of mood characterized by alternating episodes of depression and mania

Medical Definition

bipolar disorder

noun
: any of several mood disorders characterized usually by alternating episodes of depression and mania

Note: The mania experienced in bipolar disorder may be of the euphoric or irritable type or both.

called also bipolar affective disorder, bipolar illness, manic depression, manic-depressive illness

compare major depressive disorder

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