I. Tra ‧ fal ‧ gar, Cape /trəˈfælɡəʳ/ BrE AmE
the most southwesterly point of Spain. In the sea near the cape, British ships under ↑ Nelson won an important sea battle against the French and Spanish in 1805.
II. Trafalgar, the Battle of BrE AmE
an important sea battle fought off Cape Trafalgar in southwest Spain in 1805, when British ships led by Admiral Nelson beat the French and Spanish forces. Nelson was killed in the battle, and Trafalgar Square was built in his honour.