add-on

Meaning

1. noun Something which can be appended to something else.
2. noun A software extension or hardware peripheral that provides additional functions or customization for a core application or system.
3. noun Additional chips that can be purchased at specific times in tournament play.
4. noun Synonym of expansion pack.

Similar words

additional supplement supplementary supplemental supplementation addition appendix complementary adjunct complement

Word family

add-ons