Added 10 October 2026 peloponnesus noun Categories: PlacesRare Words noun ! Definition from WordNet 3.1, Princeton University. More about peloponnesus at Wordnik → Where our words come from → The southern peninsula of Greece; dominated by Sparta until the 4th century BC. Related Words: peloponneserethymnosultanpurkongoniportlaoisebartlesvillekennebunkportvergleichenderovinjkenansvillepietermaritzburg Back to today's word