Definition of plug-in
- a plug-in toy
- a plug-in circuit board
computers : a small piece of software that adds a feature to a larger program or makes a program work better
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Merriam-Webster's New Words Quiz—Fall 2017 Edition!
Test your knowledge - and maybe learn something along the way.TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.TAKE THE QUIZ