two-factor authentication
noun
two-fac·tor authentication
ˈtü-ˈfak-tər- 
: a method of verifying the identity of a person (as for granting access to a system) by requiring a password and an additional form of authorization (such as a code, a fingerprint, or a smartphone app)
—abbreviation 2FA
compare multi-factor authentication
Examples of two-factor authentication in a Sentence
Recent Examples on the Web
Secure your primary email with a long, unique password and two-factor authentication.
—
Kurt Knutsson, FOXNews.com, 31 Dec. 2025
Adding two-factor authentication can further hinder cybercriminals.
—Evan Zimmer, CNBC, 9 Dec. 2025
And as with any other service, don't forget to enable two-factor authentication on your AI accounts.
—Jp Aumasson, Wired News, 29 Nov. 2025
Devices must also be running iOS 16.1 or newer and have Face ID, Touch ID, and two-factor authentication enabled.
—Mack Degeurin, Popular Science, 13 Nov. 2025
See All Example Sentences for two-factor authentication
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Kurt Knutsson, FOXNews.com, 31 Dec. 2025
Adding two-factor authentication can further hinder cybercriminals.
—Evan Zimmer, CNBC, 9 Dec. 2025
And as with any other service, don't forget to enable two-factor authentication on your AI accounts.
—Jp Aumasson, Wired News, 29 Nov. 2025
Devices must also be running iOS 16.1 or newer and have Face ID, Touch ID, and two-factor authentication enabled.
—Mack Degeurin, Popular Science, 13 Nov. 2025
See All Example Sentences for two-factor authentication
Cite this Entry
“Two-factor authentication.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/two-factor%20authentication. Accessed 5 Jan. 2026.
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