- capable of or designed for being connected to an electrical power source by plugging in or inserting: a plug-in hair dryer;a plug-in transistor.
- plug (def. 3).
- jack1 (def. 3).
- a plug-in appliance.
- a small software program that builds additional functionality into a stand-alone computer application: Your web browser can’t display this video without a plug-in.
- to connect (an electrical appliance) with a power source by means of an electrical plug
- a device that can be connected by means of a plug
- a module or piece of software that can be added to a system to provide extra functions or features, esp software that enhances the capabilities of a web browser
- (as modifier)
