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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.

Individuals should update software, use password managers, enable two-factor authentication and try passkeys to boost their security.

From The Wall Street Journal • Apr. 19, 2026

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

From Science Daily • Apr. 2, 2026

"Nature is a great choice from a banknote authentication perspective and means we can showcase the UK's rich and varied wildlife on the next series of banknotes," she added.

From Barron's • Mar. 12, 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

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

From "Holes" by Louis Sachar