Charles III

WordReference Random House Unabridged Dictionary of American English © 2025

Charles III, 

1. Ancient History, Biographical See Charles II (def. 2).
2. Biographical, Ancient History ("Charles the Simple'') a.d. 879–929, king of France 898–923.
3. Biographical See Charles VI (def. 2).
4. Biographical 1716–1788, king of Spain 1759–88;
   as Charles IV, king of Naples 1734–59.

Collins Concise English Dictionary © HarperCollins Publishers::

Charles III noun

1. known as Charles the Fat. 839–888 ad, Holy Roman Emperor (881–887) and, as Charles II, king of France (884–887). He briefly reunited the empire of Charlemagne
2. 1716–88, king of Spain (1759–88), who curbed the power of the Church and tried to modernize his country
3. born 1948, king of Great Britain and Northern Ireland from 2022; son of Elizabeth II; he married Lady Diana Spencer in 1981, they divorced in 1996; he married (2005) Camilla Parker Bowles who became queen consort on his accession to the throne and queen in 2023