reginacide noun3 •The killing of a queen (female monarch or wife of a king).[A sketch of Edward Oxford’s attempted assassination of Queen Victoria.] — 1840 •The killing of a queen (reproductive female insect). •One who kills a queen.However, my old enemy, Miss [Edith] Sitwell, is now enthroned. I was not at the coronation, I am not among her subjects. But I have no inclination left to be a reginacide or even a jeering republican. — 1950 formsreginacides