Overview of noun plug-in

The noun plug-in has 1 sense

• circuit board, circuit card, board, card, plug-in, add-in -- (a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities)

Overview of verb plug-in

The verb plug in has 1 sense

• plug in, plug into, connect -- (plug into an outlet; "Please plug in the toaster!"; "Connect the TV so we can watch the football game tonight")