- Isabella I as a noun:
- 1
Isabella I
noun
1 Isabella I
The queen of Castile whose marriage to Ferdinand of Aragon in 1469 marked the beginning of the modern state of Spain; they instituted the Spanish Inquisition in 1478 and sponsored the voyages of Christopher Columbus in 1492 (1451-1504).
synonyms: Isabella, Isabella the Catholic, Queen Isabella.
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