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\ ˈpləg-ˌin 
\
\Definition of plug-in
(Entry 1 of 3)
: designed to be connected to an electric circuit by plugging in
a plug-in toy a plug-in circuit board
plug-in
nounDefinition of plug-in (Entry 2 of 3)
1 : something that plugs in
2 : a small piece of software that supplements a larger program (such as a browser)
plug in
verbplugged in; plugging in; plugs in
Definition of plug in (Entry 3 of 3)
: to establish an electric circuit by inserting a plug
: to attach or connect to an electric receptacle (such as an outlet)
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Merriam-Webster unabridgedWords at Play
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Time Traveler for plug-in
The first known use of plug-in was in 1903
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