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add-on

1 of 2

noun

ˈad-ˌän How to pronounce add-on (audio)
-ˌȯn
: 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 device
2
: able to be added to
add-on certificates of deposit

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

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