1. extends over the same area, space, or time as something else; has the same range or scope
Usage: formal; often used in philosophy, logic, and technical contexts

Examples

• The jurisdiction of the state coextends with its geographical boundaries.
• In logic, two concepts coextend when they apply to exactly the same set of objects.
• The warranty period coextends with the manufacturer's guarantee.
• The empire's influence coextended with its military reach.
• These two definitions coextend in meaning, covering identical ground.