Definition of killer app in English:

killer app

Syllabification: kill·er app


  • A feature, function, or application of a new technology or product that is presented as virtually indispensable or much superior to rival products.
    More example sentences
    • E-mail was the killer app of the Internet revolution, and now people dread opening theirs each morning.
    • Every platform vendor hopes someone will produce a killer app for its product, driving up sales of the platform technology as more and more people want it for themselves.
    • His entire rant is about how mobile email won't be the killer app for mobile devices.


from killer and app, a shortening of application.

More definitions of killer app

Definition of killer app in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day maelstrom
Pronunciation: ˈmeɪlstrəm
a powerful whirlpool in the sea