Spanish word meaning castle or fortress. Often appears in place names and surnames throughout Spanish-speaking regions.
From Latin 'castellum', diminutive of 'castrum' (fortified place, camp). The word evolved through Vulgar Latin into Spanish, maintaining its meaning of fortified structure.
You can trace the expansion of Spanish culture by following 'castillo' around the world - from Castillo de San Marcos in Florida to countless streets, neighborhoods, and family names that commemorate the fortress-building heritage of Spanish colonization.
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