add-on

1 of 2

noun

ˈad-ˌän 

-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

Synonyms

Noun

• accessory
• accessary
• accoutrement
• accouterment
• adapter
• adaptor
• adjunct
• appendage
• appliance
• attachment
• option

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

Noun

All of the fares listed have availability on select days throughout the end of 2024, and are available for purchase in Allegiant's lowest class of service, however passengers can select add-ons for a bundle that includes a carry-on item, seat assignment, and priority access for an additional fee. —Michael Cappetta, Travel + Leisure, 6 Dec. 2024

Apple’s Passwords App Available More Widely Apple wants its Passwords app to be available as widely as possible, and the Firefox add-on is part of this. —Kate O'Flaherty, Forbes, 5 Dec. 2024

Adjective

For these patients, Nexletol could be an effective add-on treatment. —Nick Blackmer, Verywell Health, 22 Mar. 2023

These add-on panels, along with the bumpers and mirrors, are all painted the color of the body, which on the 16V is restricted to silver, red, or black. —Csaba Csere, Car and Driver, 21 Mar. 2023

Word History

First Known Use

Noun

1930, in the meaning defined above

Adjective

1955, in the meaning defined at sense 1

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