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

Rudy Giuliani, who briefly advised Donald Trump on cybersecurity before taking a role as his personal attorney, doesn't understand how domain names work. Timothy B. Lee, Ars Technica, "Giuliani can’t figure out how URLs work, blames Twitter for liberal bias," 5 Dec. 2018 Masterson isn’t an expert on cybersecurity, but on state elections. Benjamin Wofford, Vox, "The midterms are already hacked. You just don’t know it yet.," 25 Oct. 2018 And at Code, Eric Rosenbach taught one of the courses at Harvard on cybersecurity. Eric Johnson, Recode, "Full Q&A: 2U CEO Chip Paucek on Recode Decode," 14 Oct. 2018 The United States is not directing enough attention to cybersecurity, former President Bill Clinton told an audience at the Tobin Center on Monday during a tour promoting his book, whose theme is just that. Jasper Scherer, San Antonio Express-News, "Bill Clinton talks politics and cybersecurity in S.A. appearance," 11 June 2018 Qualcomm’s contracts with the government, including consulting on cybersecurity, could also could be issues. Roger Showley,, "Federal review of Broadcom-Qualcomm deal: A good thing?," 9 Mar. 2018 But the success of the experiment shows that deep learning could be a valuable tool in the constantly shifting world of cybersecurity. Sophie Weiner, Popular Mechanics, "Google's AI Taught Itself To Encrypt Messages," 29 Oct. 2016 France was a distant second with 6.4 million, according to the cybersecurity firm, whose report covered the first half of 2018. Brooke Crothers, Fox News, "Russia is the top aggressor of internet attacks on the US," 7 Sep. 2018 President Barack Obama also issued national emergencies in response to African conflicts like Somali piracy, as well as taking on Chinese cybersecurity threats and Russia after the invasion of Crimea in Ukraine. Lucy Diavolo, Teen Vogue, "Donald Trump Is Threatening to Declare a National Emergency to Get Border Wall Funding. Here's Why He Shouldn’t.," 11 Jan. 2019

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

Statistics for cybersecurity

Last Updated

18 May 2019

Look-up Popularity

Time Traveler for cybersecurity

The first known use of cybersecurity was in 1989

See more words from the same year

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).


using a distributed computer network

Get Word of the Day daily email!

Test Your Vocabulary

Time Traveler Quiz: Which Word Came First?

  • time traveler quiz which word came first
  • Which came first?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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