Entry 1 sense Webster, 1913 Bronchitis /bräng-kīt'-əs/ · Bron·chi·tis · IPA /bɹɒŋˈkaɪtɪs/ 01 n. Inflammation, acute or chronic, of the bronchial tubes or any part of them. 1. Inflammation, acute or chronic, of the bronchial tubes or any part of them.(Med.)