bronchitisPronunciation: /brɒŋˈkʌɪtɪs/Translate bronchitis | into French | into German | into Italian | into Spanish Definition of bronchitis noun [mass noun] inflammation of the mucous membrane in the bronchial tubes. It typically causes bronchospasm and coughing. Derivatives bronchiticPronunciation: /-ˈkɪtɪk/ adjective & noun bronchitis in other Oxford dictionaries Definition of bronchitis in the US English dictionary