Add-on in a sentence as a noun

The load/unload on demand been moved into the browser, so its not so essential to have it as an add-on anymore.

The problem is they have created this monster of add-on services and items, all with little footnotes and gotchas.

The Kinect add-on has been one of the most popular consumer electronics devices in history.

Add-on definitions

noun

a component that is added to something to improve it; "the addition of a bathroom was a major improvement"; "the addition of cinnamon improved the flavor"

See also: addition improver

noun

a supplementary component that improves capability

See also: accessory appurtenance supplement