add-on
Pronunciation
/ˈædˈɑːn/
British pronunciation
/ˈadˈɒn/

Definition & Meaning of "add-on"in English

Add-on
01

a supplementary piece designed to enhance the performance or capability of an existing item

example
Examples
The new toolbar was a useful add-on to the web browser, providing additional functionality.
He bought an add-on for his gaming console that allowed for better graphics performance.
02

a supplementary component that improves capability

03

a software module that extends or enhances the capabilities of an existing application

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