add on
verb, noun
add on is spelled A-D-D-O-N: 5 letters. As a verb, add on means “To incorporate (something extra, often an amount of money) into something else (often a bill)” (English Wiktionary, September 2026).
How many letters and syllables are in add on?
| Letters | 5: A-D-D-O-N |
|---|---|
| In writing | a phrase: the frequency list counts single words |
| Wrong spellings searched | none measured in search |
| Pairs people search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you pronounce add on?
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-add-on.wav, Wikimedia Commons (author and licence on each file's page).
Words people confuse with add on
Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).
Also written: addon (one word or two).
Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).
Forms of add on
- add-ons plural
- addon
- adds on present, singular, he/she/it
- adding on participle, present
- added on participle, past
- add ons plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does add on mean?
The meanings the English Wiktionary records, quoted as written there (source below).
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.
noun
- 1
Something which can be appended to something else.
- 2
A software extension or hardware peripheral that provides additional functions or customization for a core application or system.
- 3
Additional chips that can be purchased at specific times in tournament play.
- 4
Synonym of expansion pack.
noun
- 1
Alternative form of add-on.
The manufacturer sold many add ons for the basic camera.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Add on in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | ajout, extension , addiciel |
| German | Erweiterung , Addon, Add-on, Add-On |
| Portuguese | extensão , complemento, suplemento, adicional, extra |
| Spanish | extensión |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does add on come from?
Deverbal from add on.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).