noun
queen consort; empress consort
Refers specifically to the wife of a reigning king or emperor, not a reigning monarch herself. For a reigning queen, 女王 (じょおう) is used.
王妃は国民に愛されていた。
The queen consort was loved by the people.
イギリスの王妃は公務に忙しい。
The British queen consort is busy with official duties.