middlelayer

2. In computing, a middle layer is the software part that sits between the user interface and the database.

The app's middle layer handles all the requests between the screen and the server.

3. In clothing, a middle layer is the warm piece worn between a base layer and an outer coat.

Wear a fleece as your middle layer when hiking in cold weather.

4. In networking, the middle layer is the part that connects different systems and helps them talk to each other.

The middle layer translates messages so the old system and the new one can work together.