altitudinarian UK /ˌæltɪˌtjuːdɪˈnɛəɹi.ən/US /ˌæltɪˌtudəˈnɛɹi.ən/adjective 1noun 1forms 3 adjective1 •Lofty in doctrine, aims, etc. noun1 •One who is lofty in doctrine, aims, etc. formsaltitudinarians · more altitudinarian · most altitudinarian