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

Nationwide offers cyber liability insurance for a wide variety of industries, with useful add-ons like legal consultations and network vulnerability testing. —Jasmin Suknanan, CNBC, 22 Feb. 2025

The Indiana Department of Revenue determined that a video game publishing company’s sales from add-ons are not subject to sales tax. —Kelly Phillips Erb, Forbes, 22 Feb. 2025

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

Rhymes for add-on

• anton
• argon
• axon
• baronne
• baryon
• baton
• boron
• buisson
• bygone
• capon
• cardon
• chiffon

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