add-on

[ ad-on, -awn ]

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.

adjective

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

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

add-on

noun

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

Word History and Origins

Origin of add-on¹

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

Example Sentences

Add on a handmade copita for sipping the agave-based spirit.

From Los Angeles Times

Add on confusing and conflicting messaging coming from leaders in public health and government, and it becomes easier to forget what happened in early 2020 than to try to find an anchor of truth in a soupy mess of misinformation.

From Salon

But note the "to deliver change" in the Budget strapline as an add on - a sign - that the chancellor is under pressure to spell out what the point of tax rises are, what the merits of squeezing some spending is.

From BBC

In my ideal Sunday, I’d have to add on extra hours to go down to the Last Bookstore in DTLA.

From Los Angeles Times

“But I do know that the offense is aware of what we’ve been going through as a staff. They can’t take nights off, at-bats off. When we need to add on or fight to get back into a game to give it to guys in the bullpen, we need to do that.”

From Los Angeles Times