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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Earlier this month, the star was granted entry into a mental health diversion program, and a judge said that his arrest stemmed from his bipolar disorder diagnosis. Rachel Desantis, PEOPLE, 21 Apr. 2026 Weed also did not improve other mental health conditions such as anorexia nervosa, bipolar disorder or psychotic disorders such as schizophrenia. Sandee Lamotte, CNN Money, 20 Apr. 2026 Jessica’s daughter has a nonverbal learning disability, mild attention-deficit/hyperactivity disorder and bipolar disorder. Charles Bell, The Conversation, 20 Apr. 2026 In eighth grade, Josh was diagnosed with bipolar disorder. Meghan O'Brien, NBC news, 13 Apr. 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 29 Apr. 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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