1. situated on this side of the Atlantic Ocean, especially on the American side
Usage: formal or technical; often used in geographical or political contexts

Examples

• The cisatlantic colonies maintained strong trade ties with the mainland.
• Cisatlantic shipping routes were heavily monitored during the war.
• The cisatlantic perspective on European affairs differed significantly from that of the Old World.
• Cisatlantic nations coordinated their defense strategies.
• The cisatlantic region experienced rapid industrial growth in the 19th century.