1. existing, occurring, or operating between islands

Examples

• The interisland ferry connects all the major islands in the chain.
• Interisland flights are much cheaper than international ones.
• The company operates an interisland shipping service.
• We took an interisland cruise to visit multiple destinations.
• The interisland highway project will link the islands with bridges.
• Interisland trade has been important to the local economy for centuries.