Entry 1 sense Webster, 1913 Glottis /glät'-əs/ · Glot·tis · IPA /ˈɡlɑ.tɪs/ 01 n. The opening from the pharynx into the larynx or into the trachea. See Larynx. 1. The opening from the pharynx into the larynx or into the trachea. See Larynx.(Anat.) See: Larynx