cer·ti·fy | \ˈsər-tə-ˌfī \
certified; certifying

Definition of certify 

transitive verb

1 : to attest authoritatively: such as

a : confirm

b : to present in formal communication

c : to attest as being true or as represented or as meeting a standard

d : to attest officially to the insanity of

2 : to inform with certainty : assure

3 : to guarantee (a personal check) as to signature and amount by so indicating on the face

4 : to recognize as having met special qualifications (as of a governmental agency or professional board) within a field agencies that certify teachers

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Other Words from certify

certifier \-ˌfī(-ə)r \ noun

Synonyms & Antonyms for certify


accredit, authorize, commission, empower, enable, invest, license (also licence), qualify, vest, warrant



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Choose the Right Synonym for certify

certify, attest, witness, vouch mean to testify to the truth or genuineness of something. certify usually applies to a written statement, especially one carrying a signature or seal. certified that the candidate had met all requirements attest applies to oral or written testimony usually from experts or witnesses. attested to the authenticity of the document witness applies to the subscribing of one's own name to a document as evidence of its genuineness. witnessed the signing of the will vouch applies to one who testifies as a competent authority or a reliable person. willing to vouch for her integrity

synonyms see in addition approve

Examples of certify in a Sentence

A judge must certify the contract. The document has been certified by the court. The car dealer certifies each car before it is sold. Has your doctor been certified?
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Recent Examples on the Web

Lawyers bring certified and registered mail there and receive proof of service under Florida law. Marci Shatzman, Sun-Sentinel.com, "Boca Raton's downtown post office won't move after all," 5 July 2018 The law didn’t take effect until 2013, when the state certified that there were no patent restrictions on the technology. Bob Egelko, SFChronicle.com, "Calif. Supreme Court upholds law requiring bullet-tracing technology on guns," 28 June 2018 The former gynecologist is accused of having taken Ines Madrigal, now aged 49, from her biological mother at birth, and given to another woman who was falsely certified as her birth mother. Casey Quackenbush, Time, "Spain to Begin the First Ever Franco-Era 'Stolen Babies' Trial," 26 June 2018 But even that won’t come until July 10, when everything, by law, must be certified and sorted out by state campaign and election officials before the money can be released. Frank Phillips, BostonGlobe.com, "For Bob Massie, a hard climb ahead," 7 June 2018 Gray's most recent endeavor, Six Bricks, is a recruiting startup built to leverage the wealth of best practices that LeadMD has created in order to educate, certify and connect today’s marketers with employers looking for talent. Grace Palmieri, azcentral, "Who's Next: 25 self-starters championing Arizona's entrepreneurial spirit," 21 May 2018 The event begins at 8:30 a.m. at Main Park on a U.S.A. Track and Field-certified and transponder-timed 5K course, then progresses to La Porte Road, through the Hickory Creek Preserve and streets of Mokena before looping back to Main Park. Ginger Brashinger, Daily Southtown, "White Sox great Carlos May to kick off Mokena's 'Chi-Town Showdown 5K'," 2 May 2018 Legrand's North and Central America's headquarters, located in West Hartford , became LEED certified by the U.S. Green Building Council in February. Michael Walsh, Courant Community, "Legrand Receives LEED Certification From U.S. Green Building Council," 2 July 2018 Scuba certification For an additional fee, passengers can take scuba diving classes on the ship to become certified by the Professional Association of Diving Instructors (PADI). Ellie Rushing, Sun-Sentinel.com, "Royal Caribbean invests $120 million in one ship for short Bahamas cruises," 25 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'certify.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of certify

14th century, in the meaning defined at sense 1

History and Etymology for certify

Middle English certifien, from Anglo-French certefier, from Late Latin certificare, from Latin certus certain — more at certain

Medieval Latin certificare, from Late Latin, to assure, convince, from Latin certus certain + -ficare to make

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Phrases Related to certify

certified check

certified organic

Statistics for certify

Last Updated

9 Oct 2018

Look-up Popularity

Time Traveler for certify

The first known use of certify was in the 14th century

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More Definitions for certify



English Language Learners Definition of certify

: to say officially that something is true, correct, or genuine

: to say officially that something or someone has met certain standards or requirements

: to say officially that someone is insane and in need of treatment


cer·ti·fy | \ˈsər-tə-ˌfī \
certified; certifying

Kids Definition of certify

1 : to show to be true or as claimed by a formal or official statement Only the teacher can certify test scores.

2 : to guarantee the quality, fitness, or value of officially certified milk certify a check

3 : to show to have met certain requirements His school needs to certify him for graduation.


cer·ti·fy | \ˈsərt-ə-ˌfī \
certified; certifying

Medical Definition of certify 

transitive verb

1 : to attest authoritatively especially : to attest officially to the mental illness of

2 : to designate as having met the requirements to practice medicine or a particular medical specialty

intransitive verb

: to attest by a certificate five year program leading to examination by the American Board which certifies in that specialtyBulletin of Meharry Medical College

Other Words from certify

certifiable \ˈsər-tə-ˌfī-ə-bəl, ˌsər-tə-ˈfī- \ adjective
certifiably \-blē \ adverb

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transitive verb
cer·ti·fy | \ˈsər-tə-ˌfī \
certified; certifying

Legal Definition of certify 

1 : to state authoritatively: as

a : to give assurance of the validity of certify corporate records

b : to present in formal communication (as an order) especially for review by an appellate court the court may certify the question to the Supreme Judicial Court— R. T. Gerwatowski — see also certification

c : to state as being true or as reported or as meeting a standard refused to certify the suit as a class action and dismissed it— Marcia Coyle

2 : to guarantee (a personal check) as to signature and amount by so indicating (as by stamping certified) on the face — see also certified check at check

3a : certificate, license

b : to designate (a labor union) as an exclusive bargaining agent or representative

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Comments on certify

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