Entry 2 senses · 2 variants Webster, 1913 Articular /är-tĭk'-yəl-ẽrˌ/ · Ar·tic·u·lar · IPA /ɑrtˈɪkjəlˌɜr/ a. n. 01 a. Of or pertaining to the joints; as, an articular disease; an articular process. 1. Of or pertaining to the joints; as, an articular disease; an articular process. 02 n. A bone in the base of the lower jaw of many birds, reptiles, amphibians, and fishes. 1. A bone in the base of the lower jaw of many birds, reptiles, amphibians, and fishes.(Anat.)