1. [ noun ] a supplementary component that improves capability
Synonyms: supplement accessory appurtenance
Related terms: component cut-in auto_accessory fitting fixings computer_accessory append
2. [ noun ] a component that is added to something to improve it
Synonyms: addition improver

"the addition of a bathroom was a major improvement" "the addition of cinammon improved the flavor"

Related terms: component additive attachment afterthought elongation softener annex better
Similar spelling:   add_on