Joseph II

WordReference Random House Unabridged Dictionary of American English © 2025

Joseph II, 

1. Biographical 1741–90, emperor of the Holy Roman Empire 1765–90 (son of Francis I;
   brother of Leopold II and Marie Antoinette).

Collins Concise English Dictionary © HarperCollins Publishers::

Joseph II noun

1. 1741–90, Holy Roman emperor (1765–90); son of Francis I. He ruled Austria jointly with his mother, Maria Theresa, until her death (1780). He reorganized taxation, abolished serfdom, curtailed the feudal power of the nobles, and asserted his independence from the pope