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Meaning of “killer app” in the English Dictionary

"killer app" in British English

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killer appnoun [C]

uk   /ˌkɪl.ər ˈæp/  us   /ˌkɪl.ɚ ˈæp/ (also killer application) informal
(Definition of killer app from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"killer app" in Business English

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killer appnoun [C]

uk   us   (also killer ap, killer application) IT
computersoftware that is very popular or useful, especially ​software that is the reason ​peoplebuycertaincomputersystems, ​mobilephones, etc.: Mobile ​access to ​socialnetworkingsites is the next killer ​app.
a use for a particular ​technology that becomes extremely popular and is the reason ​people want that ​technology: At the ​time they ​thought that ​e-learning would be the killer ​app of the ​Internet.
(Definition of killer app from the Cambridge Business English Dictionary © Cambridge University Press)
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“killer app” in Business English

Just who is driving this thing?
Just who is driving this thing?
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May 03, 2016
by Colin McIntosh Do you remember Herbie the Love Bug? Herbie was a 1963 Volkswagen Beetle car in a string of Walt Disney movies. In typical Disney anthropomorphic style, Herbie goes his own way, falls in love, cries, plays jokes, and generally has a mind of his own. While the new driverless cars, like those being

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