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 option

add-on fees

2

: able to be added to

add-on certificates of deposit

Synonyms of add-on

Noun

• option
• accessory
• appliance

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

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

Upgrading to cellular remains a $100 add-on across both generations. — Will Greenwald, PC Magazine, 17 Sep. 2026

The products on our list all have packages that either include notarization in the pricing or offer notarization as a low-cost add-on. — Jasmin Suknanan, CNBC, 16 Sep. 2026

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