1The fact of reigning or ruling; power, predominance.
In the theory of personality: the sum of all the experiences, or of the regnant processes, that are integrated in the brain in a single moment; an instance of this.
Chiefly in the work of Henry Alexander Murray (1893–1988), or with reference to this.
Mid 17th century; earliest use found in Plea for Non-Subscribers. From regnant see -ancy.