adapter

noun7

1. •
   A device or application used to achieve operative compatibility between devices that otherwise are incompatible.

   • He had an adapter that let him plug his phone into the car's cigarette lighter for power.
2. •
   Specifically, a device that permits two or more plugs to be used at a single electrical power point.

   • The wall outlet sprouted an electrical monstrosity of adapters plugged into adapters that sparked ominously.
3. •
   Specifically, a device that allows one format of plug to be used with a different format of socket.

   • We bought adapters to use our three-prong plugs in the two-prong, unpolarized outlets of the old house.
4. •
   Specifically, an AC adapter: a device that reduces voltage and converts AC to DC to allow a battery-powered device to use mains power.

   • I lost my cellphone's adapter so I couldn't recharge it.
5. •
   One who adapts a thing, e.g. a play.

   • The critic gave rave reviews to the adapter of the ancient play, who worked to give the text more relevance to the modern day.
6. •
   A collection of low-rank matrices which, when added to a base model, produces a fine-tuned model; a LoRA.
7. •
   One who is capable of adapting to differing situations.

   • He was an able adapter, and could easily adjust to the differences when the company changed ownership.