This adjective means 'of another tribe' or ethnically foreign, particularly describing non-Jews. In Acts 10:28, Peter acknowledges Jewish law forbids association with 'one of another nation.' Classical Greek used it for tribal outsiders, while the Septuagint employed it for Philistines. The multilingual glosses (Spanish 'extranjero', French 'd'une-autre-race') confirm this ethnic otherness. Peter's statement marks a crucial moment as he begins to grasp that God's acceptance transcends ethnic boundaries, preparing him to enter Cornelius's Gentile household.