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killer application

British  

noun

  1. a highly innovative, very powerful, or extremely useful computer application; esp one sufficiently important as to justify purchase of the equipment or software

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sodium-ion batteries also maintain strong performance under load in cold conditions, making them attractive for stationary energy storage systems and mobile applications operating in colder climates.

From Science Daily • Jun. 21, 2026

She got the hiring manager on board by stressing that this seemingly overqualified candidate was new to developing mobile applications.

From The Wall Street Journal • Oct. 30, 2025

Ms Robison said that under the government's records management policy, information shared on mobile applications such as WhatsApp that is relevant to the corporate record must be saved.

From BBC • Oct. 31, 2023

Tracks could contract with up to three service providers for sports wagering at the track or through online sites and mobile applications.

From Washington Times • May 1, 2023

Lebanese authorities for years have failed to curtail the black market’s hold on the currency’s value, even as they have attempted to shut down informal exchange rate websites and mobile applications.

From Seattle Times • Feb. 16, 2023

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