the world > action or operation > behaviour > a standard of conduct > [adjective] > conforming > strictly > of conduct, life, etc. (3)
figurative. Of persons, their habits, opinions, etc.: Excessively rigid or scrupulous in matters of conduct; narrow or over-precise in one's rules…
Characterized by exacting standards or demands or by adherence to these; (also) austere, ascetic.
figurative. Severe, austere, stern.