Entry 1 sense Webster, 1913 Rhinitis /(rī̇*nī"tĭs)/ · Rhi·ni·tis · IPA /ɹaɪˈnaɪtɪs/ 01 n. Inflammation of the nose; esp., inflammation of the mucous membrane of the nostrils. 1. Inflammation of the nose; esp., inflammation of the mucous membrane of the nostrils.(Med.)