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Verb: plug in
  1. Plug into an outlet
    "Please plug in the toaster!"
    - plug into, connect
Noun: plug-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: plugs in, plug-ins, plugged in, plugging in

Type of: enter, infix, insert, introduce, printed circuit

Antonym: unplug

Encyclopedia: Plug in

Plug-in