Medical Dictionary

rumination

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noun ru·mi·na·tion \ ˌrü-mə-ˈnā-shən \

medical Definition of rumination

:the act or process of ruminating:
a :the act or process of regurgitating and chewing again previously swallowed food
b :obsessive thinking about an idea, situation, or choice especially when it interferes with normal mental functioning; specifically :a focusing of one's attention on negative or distressing thoughts or feelings that when excessive or prolonged may lead to or exacerbate an episode of depression

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