certify

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certify

/ˈsɜː.tɪ.faɪ/ UK
/ˈsɝ.tɪ.faɪ/ Canada, US
[ˈsɝ.ɾɪ.faɪ] Canada, US
/ˈsɜː.tɪ.fɑe/ Australia
[ˈsɜː.ɾɪ.fɑe̯] Australia
/ˈsøː.tə.fɑe/ New Zealand
[ˈsøː.ɾə.fɑe̯] New Zealand

Where it comes from

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

verb certifies · certifying · certified

transitive To attest to (a fact) as the truth.
transitive To authenticate or verify in writing.
transitive To attest that a product, service, organization, or person has met an official standard. These blankets have been certified as fireproof.
Similar: attest, witness, vouch for, approve, confirm
archaic, transitive To inform; to tell (a person) that something is true. Our deeds do us three manners of service. First, they certify us that we are heirs of everlasting life, and that the Spirit of God, which is the earnest thereof, is in us.
archaic, reflexive To assure (oneself) of something; to ascertain. After having certified himself of her own good health, he very kindly inquired about her mother and Miss Sophy […].

Thesaurus

Closest in meaning: attest, endorse, evidence, license, demonstrate, manifest, licence, authenticate, validate, verify, approve, certification, vouch, accredit, substantiate, ascertain

Translations

Every language

verb to attest as to

Español	certificar
한국어	인증하다 injeunghada
日本語	認証する ninshō suru
中文	證明 /证明 zhèngmíng
Português	certificar
Français	certifier
Deutsch	zertifizieren
Italiano	certificare
Ελληνικά	πιστοποιώ pistopoió
Română	certifica
Русский	удостоверя́ть udostoverjátʹ, удостове́рить udostovéritʹ, заверя́ть zaverjátʹ, заве́рить zavéritʹ, подтвержда́ть podtverždátʹ, подтверди́ть podtverdítʹ
עברית	וידא vidé

verb to attest that a product, service, organization, or person has met an official standard

Русский	сертифици́ровать sertificírovatʹ

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Cite this

MLA

"certify." Wiktionary, via Micwyn, micwyn.com/word/certify. Accessed 6 Nov. 2026.

APA

certify. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/certify

Chicago

"certify." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/certify.

BibTeX

@misc{certify_2026,
  title = {certify},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/certify},
  urldate = {2026-11-06}
}