American English

Definition of plug-in noun from the Oxford Advanced American Dictionary



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  1. 1(computing) a piece of computer software that can be added to a system so that it can do more things
  2. 2(Canadian English) a connection to an electricity supply in a garage, etc. so that you can use an electric heater to warm the engine of a car, so that it starts more easily
See the Oxford Advanced Learner's Dictionary entry: plug-in

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