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Definitions

authentication

[aw-then-ti-key-shuhn] / ɔˌθɛn tɪˈkeɪ ʃən /
NOUN
confirmation
Synonyms
STRONGEST
certification verification
STRONG
attestation corroboration evidence proof substantiation testament testimonial testimony validation

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.

The process works much like two-factor authentication on a banking website.

From Science Daily • Apr. 2, 2026

But she said the key is "prevention and education", including limiting personal information online, using strong passwords and two-factor authentication, and being cautious before sending money or personal images.

From BBC • Mar. 11, 2026

That’s led to security concerns, as cybersecurity company Wiz identified a database misconfiguration in early February that left 1.5 million API authentication tokens, 35,000 email addresses and private messages between agents exposed.

From MarketWatch • Mar. 10, 2026

New authentication systems will be needed to stop fraudsters from sending fake invoices to bots, for example.

From Barron's • Feb. 12, 2026

"I needed authentication from the Attorney General," said the Warden.

From "Holes" by Louis Sachar