• synonyms


verb (used with object), in·ter·pen·e·trat·ed, in·ter·pen·e·trat·ing.
  1. to penetrate thoroughly; permeate.
  2. to penetrate with (something else) mutually or reciprocally.
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verb (used without object), in·ter·pen·e·trat·ed, in·ter·pen·e·trat·ing.
  1. to penetrate between things or parts.
  2. to penetrate each other.
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Origin of interpenetrate

First recorded in 1800–10; inter- + penetrate
Related formsin·ter·pen·e·tra·ble [in-ter-pen-i-truh-buh l] /ˌɪn tərˈpɛn ɪ trə bəl/, adjectivein·ter·pen·e·trant, adjectivein·ter·pen·e·tra·tion, nounin·ter·pen·e·tra·tive, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for interpenetrate

Historical Examples

  • They interpenetrate and a change in one affects all the others.

    A Preface to Politics

    Walter Lippmann

  • They interpenetrate, interlace, correspond with and embrace each other.

  • They are akin, they interpenetrate, they mutually aid and complete each other.

  • But those departments over-lap and interpenetrate each other.

  • Present-day man possesses four bodies of increasing fineness, the elements of which interpenetrate.


    Th. Pascal

British Dictionary definitions for interpenetrate


  1. to penetrate (something) thoroughly; pervade
  2. to penetrate each other or one another mutually
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Derived Formsinterpenetrable, adjectiveinterpenetrant, adjectiveinterpenetration, nouninterpenetrative, adjectiveinterpenetratively, adverb
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 interpenetrate


1809, from inter- + penetrate. Related: Interpenetrated; interpenetrating.

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Online Etymology Dictionary, © 2010 Douglas Harper