Entry 1 sense Webster, 1913 Dermatitis /dẽrmˌ-ət-īt'-ĭs/ · Der·ma·ti·tis · IPA /ˌdɜː(ɹ)m.əˈtaɪ.tɪs/ 01 n. Inflammation of the skin. 1. Inflammation of the skin.(Med.)