add-on

Definitions

A hardware or software component that can be added to a system to increase its capabilities or features.

Something extra or additional that is attached to or included with a main item.

Examples

The browser add-on allows you to block intrusive advertisements while you surf the web.

You can purchase the extended warranty as an add-on to your new appliance package.

Synonyms

extension supplement accessory attachment enhancement extra appendage

Antonyms

reduction subtraction detachment omission removal core component essential element