proxy

1. An agent or substitute authorized to act for another person.
2. The authority to act for another, especially when written.
3. The written appointment of a proctor in suits in the ecclesiastical courts.
4. A measurement of one physical quantity that is used as an indicator of the value of another
5. An interface for a service, especially for one that is remote, resource-intensive, or otherwise difficult to use directly.

1. To serve as a proxy for.
2. To function as a server for a client device, but pass on the requests to another server for service.

1. Used as a proxy or acting as a proxy.

   a proxy indicator

noun

A proximity mine; a mine that explodes when something approaches within a certain distance.