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[in-uh n-deyt, -uhn-, in-uhn-deyt] /ˈɪn ənˌdeɪt, -ʌn-, ɪnˈʌn deɪt/
verb (used with object), inundated, inundating.
to flood; cover or overspread with water; deluge.
to overwhelm:
inundated with letters of protest.
Origin of inundate
1615-25; < Latin inundātus, past participle of inundāre to flood, overflow, equivalent to in- in-2 + und(a) wave + -ātus -ate1
Related forms
inundation, noun
inundator, noun
[in-uhn-duh-tawr-ee, -tohr-ee] /ɪnˈʌn dəˌtɔr i, -ˌtoʊr i/ (Show IPA),
superinundation, noun
uninundated, adjective
2. glut. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for inundation
Historical Examples
  • Prouided, that the ground neither be boggy, nor the inundation be past 24.

    A New Orchard And Garden William Lawson
  • Hathor was regarded in tradition as the cause of the inundation.

    The Evolution of the Dragon G. Elliot Smith
  • We have our wonders of inundation in Suffolk also, I can tell you.

    Letters of Edward FitzGerald Edward FitzGerald
  • Should the inundation increase, where could they find refuge?

  • “I think it was an inundation or a big fire,” she a little languidly smiled.

    The Patagonia Henry James
  • Was it a flood—an inundation—a sudden swelling of the stream?

    The Desert Home Mayne Reid
  • However, I had never seen an inundation before, and I may have been mistaken.

    Up the River Oliver Optic
  • When I saw Foch on this afternoon, however, he was all in favour of the inundation.


    John French, Viscount of Ypres
  • But we were now within the limits of the annual inundation; and but few plants can thrive there.

    The Quadroon Mayne Reid
  • There is no reason whatever for this inundation of generic names.

    Bruin Mayne Reid
British Dictionary definitions for inundation


verb (transitive)
to cover completely with water; overflow; flood; swamp
to overwhelm, as if with a flood: to be inundated with requests
Derived Forms
inundant, inundatory, adjective
inundation, noun
inundator, noun
Word Origin
C17: from Latin inundāre to flood, from unda wave
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
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Word Origin and History for inundation

early 15c., from Latin inundationem (nominative inundatio) "an overflowing," noun of action from past participle stem of inundare "to overflow," from in- "onto" (see in- (2)) + undare "to flow," from unda "wave" (see water).



1620s, back-formation from inundation, or else from Latin inundatus, past participle of inundare "to overflow, run over" (see inundation). Related: Inundated; inundating.

Online Etymology Dictionary, © 2010 Douglas Harper
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