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killer app
Computers, Informal.
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This shows grade level based on the word's complexity.
an application that surpasses its competitors.
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Origin of killer app
1985–90
Words nearby killer app
Killarney, killdee, killdeer, Killeen, killer, killer app, killer application, killer bars, killer bee, killer boat, killer cell
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use killer app in a sentence
The killer app, code-named Orca, transmogrified into a beached whale on election day.
For Wii U owners, that killer app will be the next part of the Super Smash Bros. series, which promises to be completely amazing.
It's telephony's biggest "killer app" since Skype or even voice-over-IP.