Definition of catarrh noun from the Oxford Advanced Learner's Dictionary



BrE BrE//kəˈtɑː(r)//
; NAmE NAmE//kəˈtɑːr//
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thick liquid (called phlegm) that you have in your nose and throat because, for example, you have a cold Word Originearly 16th cent.: from French catarrhe, from late Latin catarrhus, from Greek katarrhous, from katarrhein ‘flow down’, from kata- ‘down’ + rhein ‘flow’.
See the Oxford Advanced American Dictionary entry: catarrh