plug-in

 

adjective

  • able to be connected by means of a plug: a plug-in kettle
  • Computing (of a module or software) able to be added to a system to give extra features or functions: a plug-in graphics card

noun

  • 1 Computing a plug-in module or plug-in software.
  • 2Canadian an electric socket in a car park or garage for plugging in the block heater of a vehicle to prevent the engine from freezing.