add on

verb

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

“The manufacturer sold many add ons for the basic camera.”

Similar
appendsupplementaffix
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Meanings

verbadd on (third-person singular simple present adds on, present participle adding on, simple past and past participle added on)

present singular third person adds on · participle present adding on · participle past added on · past added on

  1. transitiveTo incorporate (something extra, often an amount of money) into something else (often a bill).
  2. intransitiveTo put an expansion (addition) onto a building, usually a home.
nounadd on (plural add ons)

plural add ons

  1. alternativeAlternative form of add-on.

    The manufacturer sold many add ons for the basic camera.

    1 more example

    The secretary offered a typing and copying service for theses, with the option of binding as an add on.

Synonyms & antonyms

verbadd to the very end

Similar
appendsupplementaffix
Broader
attach
Also see
affixappendincorporateintegratesupplementswallow

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

add on. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/add%20on

MLA

“add on.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/add%20on. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “add on,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/add%20on.

Source: add on on Wiktionary, CC BY-SA 4.0.