cy·​ber·​se·​cu·​ri·​ty | \ ˈsī-bər-si-ˌkyu̇r-ə-tē How to pronounce cybersecurity (audio) \

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 Estimates from cybersecurity company Emsisoft Ltd. show that attacks against schools, local governments and healthcare providers alone jumped to at least 2,354 in 2020 from 966 in 2019. James Rundle, WSJ, "How Can Companies Cope with Ransomware?," 9 May 2021 People around the world were exposed to about 125 percent more smishing attempts every three months, a new study from the cybersecurity company Lookout found. NBC News, "Why cyber criminals looking to steal personal info are using text messages as bait," 6 May 2021 That startup evolved from a consulting shop to a cybersecurity company that was an early player in password management for enterprise customers. Brittany Meiling, San Diego Union-Tribune, "He sold his last startup for $1.4 billion. Now he’s running a tech accelerator in San Diego," 6 May 2021 About 30 payments ended up going to the hacker’s Bitcoin wallet, according to Mikko Hyppönen, the chief research officer at F-Secure, a global cybersecurity company. William Ralston, Wired, "Then a Hacker Began Posting Patients’ Deepest Secrets Online," 4 May 2021 But by the time Owens had informed Apple, malicious hackers had already started exploiting the issue, according to Jaron Bradley, a Mac expert at cybersecurity company Jamf, which published research into the attacks on Monday. Thomas Brewster, Forbes, "Update Your Mac Now: The ‘Worst Hack In Years’ Hits Apple Computers," 26 Apr. 2021 In 2019, automotive cybersecurity company Karamba Security posted a fake vehicle electronic control unit online. Eric A. Taub New York Times, Star Tribune, "Carmakers struggle to stay ahead of hackers," 16 Apr. 2021 Darktrace, a cybersecurity company, today announced plans for an IPO on the the London Stock Exchange. Sophie Mellor, Fortune, "Spring is in the air: U.K. IPOs pick up, companies predict recovery and shoppers return," 12 Apr. 2021 So far this year, 26 government agencies in the U.S. have been hit by ransomware, with cybercriminals releasing online data stolen from 16 of them, said ransomware analyst Brett Callow of the cybersecurity firm Emsisoft. Fox News, "DC police hit with apparent ransomware attack carried out by Russian-speaking cybercriminals," 27 Apr. 2021

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.

See More

First Known Use of cybersecurity

1989, in the meaning defined above

Keep scrolling for more

Learn More about cybersecurity

Time Traveler for cybersecurity

Time Traveler

The first known use of cybersecurity was in 1989

See more words from the same year

Statistics for cybersecurity

Last Updated

12 May 2021

Cite this Entry

“Cybersecurity.” Dictionary, Merriam-Webster, Accessed 18 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for cybersecurity


cy·​ber·​se·​cu·​ri·​ty | \ ˈsī-bər-si-ˈkyu̇r-ə-tē How to pronounce cybersecurity (audio) \

Legal Definition of cybersecurity

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

Comments on cybersecurity

What made you want to look up cybersecurity? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Words Used by Nabokov Quiz

  • image1676440788
  • Choose the best definition or synonym for the word in bold: "There are some eructations that sound like cheers—at least, mine did." Lolita
Name That Thing

Test your visual vocabulary with our 10-question challenge!


Anagram puzzles meet word search.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!