cy·​ber·​se·​cu·​ri·​ty | \ˈsī-bər-si-ˌkyu̇r-ə-tē \

Definition of cybersecurity 

: measures taken to protect a computer or computer system (as on the Internet) against unauthorized access or attack

Examples of cybersecurity in a Sentence

Recent Examples on the Web

That ubiquity makes protecting Wi-Fi from hackers one of the most important tasks in cybersecurity. Brian Barrett, WIRED, "The Next Generation of Wi-Fi Security Will Save You From Yourself," 26 June 2018 In the wake of the massive DDoS attack that brought down huge swaths of the internet last week, strengthening cybersecurity is on everyone's minds. Sophie Weiner, Popular Mechanics, "Google's AI Taught Itself To Encrypt Messages," 29 Oct. 2016 The committee also put questions to Teri Donaldson, the nominee to beDOE's inspector general, and Karen Evans, the nominee for the new position of DOE's assistant secretary of cybersecurity, energy security, and emergency response. Adrian Cho, Science | AAAS, "Senators question nominees for DOE's science and clean-energy research wings," 27 June 2018 Cutting-Edge Programs UMUC's cybersecurity courses can help prepare you for selected DOD 8140 certifications. Brandan Blom,, "Austin Prep gearing up for another run in Division 3," 23 May 2018 The data breach that Ticketmaster revealed in June is part of a larger credit card-skimming operation that has hit more than 800 e-commerce sites across the internet, according to cybersecurity firm RiskIQ. Jacob Taylor /, NBC News, "Ticketmaster data theft part of larger credit card scheme, security firm says," 10 July 2018 But a local election in Tennessee last week highlights the concern: Knox County has hired a cybersecurity firm to investigate why a website that reports election results crashed after the polls closed. The Washington Post,, "Oliver North slated to become president of the NRA," 7 May 2018 In February, the SEC published a formal statement that officially codified something that any competent executive should have known long ago: cybersecurity risks and issues are material events that are subject to insider-trading laws. Dan Goodin, Ars Technica, "Senior ex-Equifax executive charged with insider trading," 14 Mar. 2018 In July 2016, a loose-knit community of computer scientists and cybersecurity experts discovered a strange pattern of online traffic between two computer servers. Jonathan Chait, Daily Intelligencer, "Will Trump Be Meeting With His Counterpart — Or His Handler?," 8 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cybersecurity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cybersecurity

1989, in the meaning defined above

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Last Updated

16 Nov 2018

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The first known use of cybersecurity was in 1989

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cy·​ber·​se·​cu·​ri·​ty | \ˈsī-bər-si-ˈkyu̇r-ə-tē \

Legal Definition of cybersecurity 

: measures taken to protect a computer or computer system (as on the Internet) against unauthorized access or attack

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