add-on

American  

[ad-on, -awn] / ˈædˌɒn, -ˌɔn /

noun

1. a device or unit added to equipment or a construction.

   an add-on to a computer;

   a nice add-on to an old house.

2. an extra charge.

   Add-ons for taxes and tour guide fees boosted the price of the vacation to $2,500.

3. an additional item, as a rider or provision.

   This is just another legislative add-on.

4. anything added on.

   Our sable faux fur vest is an easy add-on for dressy or casual occasions.

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adjective

1. being installed or provided as an add-on.

   Add-on packs for this game are just a few dollars.

add-on British  

noun

1. a feature that can be added to a standard model or package to give increased benefits

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Etymology

Origin of add-on

First recorded in 1945–50; noun and adj. use of verb phrase add on

Example Sentences

In December, Comcast launched a storefront for add-on streaming apps and bundles.

From The Wall Street Journal

This may be an indication that dealers are leaving wiggle room to tack on undisclosed add-on charges.

From MarketWatch

And it is lucrative: add-on fees, or "ancillary revenue", brings in billions for these airlines every year.

From BBC

So there’s generally good profit in adding extra beef, since the only add-on cost to the restaurant is the patty itself, and that can be passed on to the consumer.

From MarketWatch

This, Ms Shotbolt argues, has enabled Steam to charge an "excessive commission of up to 30%", making UK consumers pay too much for purchasing PC games and add-on content.

From BBC

Related Words

• preservative
• supplement