Nasirean adjective 1noun 1forms 1 adjective1 •Designating the 1232 work of ethics, Akhlaq-i Nāṣirī (Nasirean Ethics), by the Persian polymath Naṣīr al-Dīn al-Ṭūsī (1201–1274). noun1 •A follower or adherent of Naṣīr al-Dīn al-Ṭūsī.According to the transmitted narrative of his birth John was a Nasirean for life, as was every member of the Essenic order. — 1894 formsNasireans