adapter

noun

1. a person or thing that adapts.
2. 1. a connector for joining parts or devices having different sizes, designs, etc., enabling them to be fitted or to work together.
   2. Also called plug adapter, adapter plug.a device that connects an electrical plug to an outlet that has a different plug shape: Last time I traveled, I brought the wrong adapter.
   3. Also called AC adapter, power adapter.a device with a cord that plugs into an electrical outlet and functions as an external power supply for a small or portable electronic device, usually converting AC current to DC: I forgot to plug in the adapter, and my laptop died.
3. an accessory to convert a machine, tool, or part to a new or modified use.
4. Computers.
   1. expansion card.
   2. an external device containing the necessary circuitry to connect to or work with another device or system: a network adapter; a wireless adapter; a video adapter.

n.

1801, agent noun from adapt. Electrical engineering sense from 1907.

n.

1. One that adapts.
2. A connecting part that joins two pieces of apparatus.
3. A converter of electric current to a desired form.