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Added 9 October 2026

certify

/ˈsɜː.tɪ.faɪ/ verb

verb Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about certify at Wordnik → Where our words come from →

To attest to (a fact) as the truth.
To authenticate or verify in writing.
To attest that a product, service, organization, or person has met an official standard.
These blankets have been certified as fireproof.

Origin

From Old French certefier (“confirm, assure, make certain”). Compare French certifier.

From Wiktionary, via Kaikki.org (CC BY-SA)

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