Queen

A queen, or queen regnant, is a female monarch who reigns in her own right, in contrast to a queen consort, who is the wife of a reigning king. An empress regnant is a female monarch who reigns in her own right over an empire. A queen regnant possesses and exercises sovereign powers. The husband of a queen regnant does not usually share his wife's rank, title or sovereignty. A queen consort shares her husband's rank and titles, but does not share the sovereignty of her husband. A queen dowager is the widow of a king who reigned in his own right. A queen mother is a queen dowager who is also the mother of a reigning sovereign.