supercilious UK /ˌsuː.pəˈsɪ.li.əs/US /ˌsu.pɚˈsɪ.li.əs/ adjective1 •Arrogantly superior; showing contemptuous indifference; haughty.[H]is supercilious glances grevv humbled, yea, his dazeling splendor (eclipst in the setting [i.e., death] of his Master) becomes quickly darkned: […] — 1638 formsmore supercilious · most supercilious