characteriology noun4 •The study of character or personality.Both in the realm of geometry and in that of characteriology, the formation of wholes proceeds according to definite laws, and it follows, therefore, that wholes are easily grasped by us. — 1936 •The study of the relationship between physical and psychological traits.By temperament, he was what the old characteriology would call a "choleric." — 1964 •Synonym of characterology. •The description of someone or something in terms of character traits.Let it be clear, however, that we are not psychologizing here; rather we are presenting at most a characteriology of thought. — 2023