verb (used with object), in·ter·pen·e·trat·ed, in·ter·pen·e·trat·ing.

to penetrate thoroughly; permeate.
to penetrate with (something else) mutually or reciprocally.

verb (used without object), in·ter·pen·e·trat·ed, in·ter·pen·e·trat·ing.

to penetrate between things or parts.
to penetrate each other.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for interpenetrate

Historical Examples of interpenetrate

  • 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



to penetrate (something) thoroughly; pervade
to penetrate each other or one another mutually
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.

Online Etymology Dictionary, © 2010 Douglas Harper