ancient region in the N Peloponnesus
An ancient region of southern Greece occupying the northern part of the Peloponnesus on the Gulf of Corinth. The cities of the region banded together in the early third century BC to form the Achaean League, which defeated Sparta but was eventually beaten by the Romans, who annexed Achaea in 146 BC and later gave the name to a province that included all of Greece south of Thessaly.
- A region in the northern head of the Peloponnese that contains mostly mountains.
From Latin Achaea, from Ancient Greek Ἀχαΐα (Akhaïa).