1 Corinthians 16:15

Achaia. In a restricted sense, the northwest of Peloponnesus; but often used by the poets for the whole of Greece. Under the Romans Greece was divided into two provinces, Macedonia and Achaia; the former including Macedonia proper, with Illyricum, Epirus, and Thessaly, and the latter all that lay south of these. In this latter acceptation the word is uniformly employed in the New Testament.