Gibraltar

n. British crown colony situated on the northwest end of the Rock of Gibraltar; narrow rocky peninsula at the southern tip of Spain; impregnable stronghold

Gibraltar is a British overseas territory located near the southernmost tip of the Iberian Peninsula overlooking the Strait of Gibraltar. The territory shares a border with Spain to the north. Gibraltar has historically been an important base for the  British Armed Forces and is the site of a Royal Navy base.
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Noun
1. location of a colony of the United Kingdom on a limestone promontory at the southern tip of Spain; strategically important because it can control the entrance of ships into the Mediterranean; one of the Pillars of Hercules
(synonym) Rock of Gibraltar, Calpe
(hypernym) colony, settlement
(part-holonym) Pillars of Hercules
(member-meronym) Gibraltarian

n. Gibraltar, British crown colony located on a narrow peninsula near the southern tip of Spain

n. Gibraltar, British crown colony situated on the northwest end of the Rock of Gibraltar; narrow rocky peninsula at the southern tip of Spain; impregnable stronghold