extrafeature
nounUK /ˈɛkstrə ˈfiːtʃə/
US /ˈɛkstrə ˈfiːtʃər/
An extra feature is a special part added to something to make it better.
The new phone has an extra feature that lets you take pictures underwater.
OTHER MEANINGS
2. A small part of a movie or game that is not the main story.
The DVD includes extra features like behind-the-scenes videos.
3. Something nice that comes with a product but is not needed.
Free delivery was an extra feature of the online shop.
4. A part of a car or machine that makes it more useful.
Heated seats are an extra feature on this car.