a queen who reigns in her own right.
Also queen regent.
Origin of queen regnant
First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for queen regnant
Her little grand-daughter, afterward our queen-regnant, Anne, was staying at Colombe for her health at that time.
She assumed the title of Queen-regnant of England and Ireland.Agnes Strickland's Queens of England, Vol. II. (of III)|Rosalie Kaufman
The post of almoner to the queen-regnant, Anne of Austria, was his reward.A Popular History of France From The Earliest Times|Francois Pierre Guillaume Guizot
British Dictionary definitions for queen regnant
a queen who reigns on her own behalf
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012