Emily Dickinson Lexicon

Gibraltar ('s), proper n. [Arabic 'mountain of Tarik'.]

1. The Rock; huge promontory; impressive rock formation; famous geologic feature at the mouth of the Mediterranean Sea; [fig.] worldly strength; earthly power; temporal security.
2. Impregnable stronghold; formidable fortress; pivotal territory on the southern coast of Spain; strategic position captured by Tāriq ibn Ziyād in 711, establishing Moorish power in Spain; [see ED letters.]