Add-on
Alternative forms
Noun
add-on
(plural add-ons)- Something which can be appended to something else.
- (computer hardware, software) A software extension or hardware peripheral that provides additional functions or customization for a core application or system.
- 2010, Kenneth Baldauf, Ralph Stair, Succeeding with Technology (page 77)Microdrives that can hold several gigabytes (see Figure 2.20) have been available as add-ons for portable devices.