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Verb: plug in
  1. Plug into an outlet
    "Please plug in the toaster!";
    - plug into, connect
Noun: plug-in  'plúg,in
  1. A printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities
    - circuit board, circuit card, board, card, add-in
     
  2. An add-on piece of software that extends the features or functionality of a larger application

Derived forms: plugging in, plug-ins, plugged in, plugs in

Type of: computer software, enter, infix, insert, introduce, package, printed circuit, software, software package, software program, software system

Antonym: unplug

Encyclopedia: Plug in

Plug-in