Boyd’s Bible Dictionary:
(the sea). Northeastern province of Asia Minor, bordering on the Pontus Euxinus, Euxine Sea. Empire of Mithridates, defeated by Pompey, B. C. 66. Many Jews settled there (Acts 2:9; 18:2; 1 Peter 1:1).
Concise Bible Dictionary:
Maritime district in the N. E. of Asia Minor, where many Jews were located: it was the native place of Aquila (Acts 2:9; Acts 18:2; 1 Peter 1:1).
Jackson’s Dictionary of Scripture Proper Names:
the sea