[en-shoor, -shur]
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verb (used with object), en·sured, en·sur·ing.
  1. to secure or guarantee: This letter will ensure you a hearing.
  2. to make sure or certain: measures to ensure the success of an undertaking.
  3. to make secure or safe, as from harm.
  4. insure(defs 1–3).

Origin of ensure

1350–1400; Middle English ensuren < Anglo-French enseurer. See en-1, sure
Related formsen·sur·er, nounun·en·sured, adjective

Synonyms for ensure

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ensured

Contemporary Examples of ensured

Historical Examples of ensured

  • For they left nothing to chance that could be ensured by effort.

    England and Germany

    Emile Joseph Dillon

  • After these vigorous but justifiable measures, obedience was ensured.

  • It was the defeat of his schemes in America that ensured their defeat in England.

  • This ensured a good bond between the wall proper and the footing.

    Concrete Construction

    Halbert P. Gillette

  • We may well be ensured that no wrong shall be done to them that have done no wrong.

    In Convent Walls

    Emily Sarah Holt

British Dictionary definitions for ensured


esp US insure

verb (tr)
  1. (may take a clause as object) to make certain or sure; guaranteethis victory will ensure his happiness
  2. to make safe or secure; protect
Derived Formsensurer, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for ensured



late 14c., from Anglo-French enseurer, from en- "make" (see en- (1)) + Old French seur "sure" (see sure); probably influenced by Old French asseurer "assure." Related: Ensured; ensures; ensuring.

Online Etymology Dictionary, © 2010 Douglas Harper