Achaia is a geographical designation used for a place people travel to, address, and associate with believers and congregational activity.

The attested uses consistently identify Achaia as a geographical designation: people travel through or to it, believers are located within it, and it is named alongside Macedonia and Jerusalem in accounts of proclamation, readiness, and assistance.

1. Geographical designation in travel and community settings · dominant

   In Acts 18:27, the accusative singular form occurs with a wish to go on to Achaia; in Acts 19:21, the same form is included in a plan to pass through Macedonia and Achaia. The genitive and dative forms locate activity and people there: in 2 Corinthians 1:1 the APB renders an address to holy ones “in the whole of Achaia,” while in 1 Thessalonians 1:8 it renders the Lord's word as sounding forth in Macedonia and Achaia.

   Acts 18:27Acts 19:212 Corinthians 1:11 Thessalonians 1:8Acts 18:12Romans 15:26

In the Anselm Project Bible: The APB regularly presents the term as “Achaia,” including travel to or through it, people in it, and activity associated with it. In 2 Corinthians 11:10 it expands the setting as “the regions of Achaia”; That wording should not be treated as a separate lexical sense.