add-on

1 of 2

noun

ˈad-ˌän How to pronounce add-on (audio)
-ˌȯn
Synonyms of add-onnext
: something added on: such as
a
: a sum or amount added on
b
: something (such as an accessory or added feature) that enhances the thing it is added to
computer hardware add-ons

add-on

2 of 2

adjective

1
: being or able to be added on
an add-on option
add-on fees
2
: able to be added to
add-on certificates of deposit

Synonyms of add-on

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Noun

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Examples of add-on in a Sentence

Noun a blow-dryer that comes with a couple of add-ons for people who are serious about styling their hair
Recent Examples on the Web
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Noun
Flournoy, 26, was the second offensive player to get an extension on Thursday after tight end Brevyn Spann-Ford landed a three-year, $18 million add-on to his expiring contract. — Nick Harris, Fort Worth Star-Telegram, 11 Sep. 2026 It is treated as a quick fix for automation or a clever add-on that makes existing workflows smoother. — Tal Dagan, Forbes.com, 10 Sep. 2026
Adjective
Currently, there is only one optical tube, the Atlas 80, but Vaonis is planning to release add-on modules designed for looking at different night sky objects, including for planetary observation. — Harry Bennett, Space.com, 15 Oct. 2026 The report puts this down to higher visitor numbers and increased spending on the tour, which includes stores, cafes and add-on experiences such as photo packages. — K.j. Yossman, Variety, 15 Oct. 2026 See All Example Sentences for add-on

Word History

First Known Use

Noun

1930, in the meaning defined above

Adjective

1955, in the meaning defined at sense 1

Time Traveler
The first known use of add-on was in 1930

Rhymes for add-on

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Browse Nearby Words

addnl
add-on
addorsed
See all Nearby Words

Cite this Entry

“Add-on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/add-on. Accessed 20 Oct. 2026.

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Legal Definition

add-on

adjective
1
: being or able to be added on
add-on no-fault benefits
2
: able to be added to
add-on certificates of deposit
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