1

add-on

noun \ ˈad-ˌän , -ˌȯn \

Definition of add-on

: 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

First Known Use of add-on

1930

in the meaning defined above

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2

add-on

adjective

Definition of add-on

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

First Known Use of add-on

1955

in the meaning defined at sense 1

See Words from the same year
NEW! Time Traveler

ADD-ON Defined for English Language Learners

add-on

Definition of add-on for English Language Learners

  • : an extra part or device that can be added to something else to improve it


Law Dictionary

add-on

adjective

legal Definition of add-on

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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