Entry 2 senses Webster, 1913 Nodular /(nŏd"ū̇*lẽr; 135)/ · Nod·u·lar · IPA /nˈɑdʒələr/ 01 a. Of or pertaining to a nodule or knot. 1. Of or pertaining to a nodule or knot. 2. Having nodules or in the form of a nodule or knot.