Peloponnesus n 1: the southern peninsula of Greece; dominated by Sparta until the 4th century BC [syn: {Peloponnese}, {Peloponnesus}, {Peloponnesian Peninsula}]
Peloponnesus \Peloponnesus\ prop. n. the southern peninsula of Greece. Syn: Peloponnese, Peloponnesian Peninsula. [WordNet 1.5]