AskDefine | Define assure

Dictionary Definition



1 make certain of; "This nest egg will ensure a nice retirement for us"; "Preparation will guarantee success!" [syn: guarantee, ensure, insure, secure]
2 inform positively and with certainty and confidence; "I tell you that man is a crook!" [syn: tell]
3 assure somebody of the truth of something with the intention of giving the listener confidence; "I assured him that traveling to Cambodia was safe"
4 be careful or certain to do something; make certain of something; "He verified that the valves were closed"; "See that the curtains are closed"; "control the quality of the product" [syn: see, check, insure, see to it, ensure, control, ascertain]
5 cause to feel sure; give reassurance to; "The airline tried to reassure the customers that the planes were safe" [syn: reassure] [ant: worry]
6 make a promise or commitment [syn: promise]

User Contributed Dictionary



From assurer (modern French assurer), from ad- + securus.


  • a RP /əˈʃʊə/


  1. To make sure and secure.
  2. To give someone confidence in the trustworthiness of something.
    I assure you, the program will work smoothly when we demonstrate it to the client.
  3. To reassure.

Derived terms


to make sure and secure
  • Finnish: varmistaa, vakuuttaa
to give someone confidence in the trustworthiness of something
  • Finnish: vakuuttaa
to reassure
  • Finnish: varmistaa



  1. Form of First-person singular present subjunctive, assurer#French|assurer
  2. Form of Third-person singular present subjunctive, assurer#French|assurer
  3. Form of Second-person singular imperative, assurer#French|assurer

Synonyms, Antonyms and Related Words

afford hope, and candle, ascertain, assert, assert under oath, asseverate, attest, augur well, avouch, back, be convincing, be sponsor for, bear up, bid fair, bolster, bond, book, brace up, bring home to, bring over, bring round, bring to reason, buck up, carry conviction, certify, cheer, cinch, clear up, clinch, comfort, condole with, confirm, console, convert, convict, convince, countersecure, countersign, decide, depone, depose, determine, dismiss all doubt, drive home to, ease, embolden, encourage, endorse, ensure, establish, find out, fix, get at, give comfort, give hope, guarantee, guaranty, have good prospects, hearten, hold out hope, hold out promise, inspire, inspire belief, inspire hope, inspirit, insure, justify hope, kiss the book, lead to believe, make a promise, make certain, make fair promise, make no doubt, make no mistake, make sure, make sure of, nail down, nerve, persuade, pledge, plight, promise, put at ease, raise expectations, raise hope, reassure, relieve, remove all doubt, satisfy, secure, see that, see to it, sell, sell one on, set at ease, set at rest, settle, sign, sign for, solace, sort out, sponsor, stabilize, stand behind, stand up for, state, subscribe to, support, swear, swear by bell, swear the truth, swear to, swear to God, swear to goodness, sympathize with, talk over, testify, troth, undersign, underwrite, vouch, vow, warrant, win over
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