Overview of noun add-on

The noun add-on has 2 senses

• addition, add-on, improver -- (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")


• accessory, appurtenance, supplement, add-on -- (a supplementary component that improves capability)

Overview of verb add-on

The verb add on has 2 senses

• add on -- (make an addition; "Let's add on to this")


• append, add on, supplement, affix -- (add to the very end; "He appended a glossary to his novel where he used an invented language")