queen consort

A queen consort is the wife of a reigning king, and usually shares her spouse's social rank and status. She holds the feminine equivalent of the king's monarchical titles and may be crowned and anointed, but historically she does not formally share the king's political and military powers, unless on occasion acting as regent. In polygynous societies, a (male) monarch has a principal or senior wife.

In contrast, a queen regnant is a female monarch who rules suo jure (Latin for, "in her own right") and usually becomes queen by inheriting the throne upon the death of the previous monarch.