cybersecurity

American  

[sahy-ber-si-kyoor-i-tee] / ˌsaɪ bər sɪˈkyʊər ɪ ti /

Or cyber security

noun

1. precautions taken to guard against crime that involves the internet, especially unauthorized access to computer systems and data connected to the internet.

2. the state of being protected against such crime.

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cybersecurity British  

/ ˌsaɪbəˌsɪˈkjʊərɪtɪ /

noun

1. computing the state of being safe from electronic crime and the measures taken to achieve this

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Etymology

Origin of cybersecurity

First recorded in 1985–90; cyber- ( def. ) + security ( def. )

Example Sentences

The cybersecurity incident was disclosed on April 1, leading to a 4.5% drop in the stock.

From MarketWatch • Apr. 23, 2026

The White House has been racing to address new cybersecurity threats posed by AI models like Mythos and others from competing labs like OpenAI.

From The Wall Street Journal • Apr. 22, 2026

Anthropic’s Mythos AI model, deemed too dangerous for public release, initially caused cybersecurity stocks to fall.

From Barron's • Apr. 21, 2026

While speculation about Mythos’ cyber capabilities initially knocked cybersecurity stocks, they have partially recovered in recent weeks as companies including CrowdStrike have joined with Anthropic to test the model and develop better security.

From Barron's • Apr. 21, 2026

Investors got even more worried after Anthropic’s Mythos AI model, which was released earlier this month, achieved a perfect score on the company’s own cybersecurity benchmark.

From MarketWatch • Apr. 20, 2026