as·​sure | \ ə-ˈshu̇r How to pronounce assure (audio) \
assured; assuring

Definition of assure

transitive verb

1 : to make sure or certain : convince glancing back to assure himself no one was following
2 : to inform positively I assure you that we can do it.
3 : to make certain the coming or attainment of : guarantee worked hard to assure accuracy
4 : to make safe (as from risks or against overthrow) : insure assured the security of the country
5 : to give confidence to And hereby we know that we are of the truth, and shall assure our hearts … — 1 John 3:19 (King James Version)

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Synonyms & Antonyms for assure



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Choose the Right Synonym for assure

ensure, insure, assure, secure mean to make a thing or person sure. ensure, insure, and assure are interchangeable in many contexts where they indicate the making certain or inevitable of an outcome, but ensure may imply a virtual guarantee the government has ensured the safety of the refugees , while insure sometimes stresses the taking of necessary measures beforehand careful planning should insure the success of the party , and assure distinctively implies the removal of doubt and suspense from a person's mind. I assure you that no harm will be done secure implies action taken to guard against attack or loss. sent reinforcements to secure their position

Examples of assure in a Sentence

I can assure you that you won't be disappointed. a minister choosing just the right words to assure the grieving parents of the fallen soldier
Recent Examples on the Web Los Cabos isn’t alone in trying to assure visitors hotels and attractions are clean. Alison Fox, Travel + Leisure, "Los Cabos Details Phased Reopening for Tourists in June — What to Know," 13 May 2020 Now, Gillard works especially closely with TSA, Customs and Border Protection (CBP), various embassies, and the airport authority to assure adherence to the latest coronavirus guidelines. Ramsey Qubein, Condé Nast Traveler, "What an Airline Station Manager Does Amid a Crisis," 12 May 2020 Tri-County Mall will ramp up its cleaning services to assure that all areas remain clean and sanitized., "Several Tri-State malls to reopen May 12 following coronavirus closure," 5 May 2020 Detroit has become a hotbed for COVID-19, with more than 9,000 cases and 1,000 deaths, and Whitmer has fought state and national powers to assure the spread of the virus is curbing in the city. Branden Hunter, Detroit Free Press, "Gov. Gretchen Whitmer earns her 'Buffs' — and the respect of Detroiters as 'Big Gretch'," 1 May 2020 Braxton wasn’t about to spend her coins that way, but Brown assured her there were cheaper alternatives. Taiia Smart Young, Essence, "Tamar Braxton Gets Real About Life During Quarantine: 'I’m Masking My Feelings With Food, With Television'," 1 May 2020 The group wants to see some of the regulatory changes made permanent in order to assure the industry’s viability once things return to normal. Fortune, "A push toward telehealth during the coronavirus pandemic has exposed fraud risks," 22 Apr. 2020 Further disruptions in other parts of the country, such as Hurricane Katrina, brought home to the federal judiciary as a whole the need for emergency preparedness to assure continuity of operations. Jed S. Rakoff, The New York Review of Books, "Covid & the Courts," 21 Apr. 2020 On Tuesday, Ivanka also posted a message to her Instagram account meant to assure small business owners that their interests were being looked after. Brianna Provenzano,, "Apparently Ivanka Trump Plans To Spearhead Small Business Recovery," 9 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'assure.' 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 assure

14th century, in the meaning defined at sense 4

History and Etymology for assure

Middle English, from Anglo-French asseurer, assurer, from Medieval Latin assecurare, from Latin ad- + securus secure

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Time Traveler for assure

Time Traveler

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

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Statistics for assure

Last Updated

22 May 2020

Cite this Entry

“Assure.” Dictionary, Merriam-Webster, Accessed 29 May. 2020.

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More Definitions for assure


How to pronounce assure (audio)

English Language Learners Definition of assure

: to make (something) certain
: to tell someone in a very strong and definite way that something will happen or that something is true


as·​sure | \ ə-ˈshu̇r How to pronounce assure (audio) \
assured; assuring

Kids Definition of assure

1 : to give certainty, confidence, or comfort to He assured the children all was well. She assured herself that the doors were locked.
2 : to inform positively I assure you that you won't be disappointed.
3 : to provide a guarantee of assure their safety Hard work assures success.
assured; assuring

Legal Definition of assure

1 chiefly British : insure
2a : to inform positively the seller assured the buyer of his honesty
b : to provide a guarantee of

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More from Merriam-Webster on assure

Thesaurus: All synonyms and antonyms for assure

Rhyming Dictionary: Words that rhyme with assure

Spanish Central: Translation of assure

Nglish: Translation of assure for Spanish Speakers

Britannica English: Translation of assure for Arabic Speakers

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