a. [ L. regnans, -antis, p. pr. of regnare to reign: cf. F régnant. See Reign. ] 1. Exercising regal authority; reigning; as, a queen regnant. [ 1913 Webster ]
2. Having the chief power; ruling; predominant; prevalent. “A traitor to the vices regnant.” Swift. [ 1913 Webster ]
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