add on

noun, verb — 6 senses

add-on

nounalso spelled add-on

Etymology Deverbal from add on.

1

Sometimes Something which can be appended to something else.

  • Payments made before an add-on sale must be allocated entirely to the previous contract or contracts.1969, Edward D. Giacomini, California Retail Installment Sales, page 172:
2

Computer hardware, Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences, Software A software extension or hardware peripheral that provides additional functions or customization for a core application or system.

  • Microdrives that can hold several gigabytes (see Figure 2.20) have been available as add-ons for portable devices.2010, Kenneth Baldauf, Ralph Stair, Succeeding with Technology, page 77:
3

Card games, Poker Additional chips that can be purchased at specific times in tournament play.

4

Video games Synonym of expansion pack.

Synonyms
addition, supplement, add-in, plug-in
Related terms
look and feel, peripheral, skin

add on

verb
1

To incorporate (something extra, often an amount of money) into something else (often a bill).

2

To put an expansion (addition) onto a building, usually a home.

Related terms
extend, pile on, tack

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for add-on and add on.