add–on /ˈædˌɑ:n/ noun
plural add–ons [count] : an extra part or device that can be added to something else to improve it
▪ He has all the latest add-ons for his computer. ▪ I knew the base price for the car, but with the add-ons I wanted, the final price was quite a bit higher. — often used before another noun ▪ add-on components ▪ add-on equipment
▪ He has all the latest add-ons for his computer. ▪ I knew the base price for the car, but with the add-ons I wanted, the final price was quite a bit higher. — often used before another noun ▪ add-on components ▪ add-on equipment
