Entry 1 sense Webster, 1913 Meatus · Me·a·tus · IPA /miˈeɪ.təs/ 01 n. sing. & pl. A natural passage or canal; as, the external auditory meatus. See Illust. of Ear. pl. Meatuses 1. A natural passage or canal; as, the external auditory meatus. See Illust. of Ear.(Anat.) See: Ear