adjective
having three poles or extremities, especially in reference to a psychological disorder characterized by three distinct personalities or moods
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The psychiatrist diagnosed the patient with tripolar disorder, a rare condition characterized by extreme mood swings.
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My friend jokingly refers to herself as tripolar because she can never make up her mind about anything.
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I heard that guy is tripolar, one minute he's happy, the next he's angry for no reason.
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The political climate in the country can be described as tripolar, with three major parties constantly vying for power.