interpenetration interpenetrate • interpenetrative · · · Info · Definitions · Synonyms · Characters · · interpenetration · · Text Latin · · Script 16 · · Length Definitions · · · (noun) the action of penetrating between or among. · · Noun Definition 1 (noun) mutual penetration; diffusion of each through the other. Synonyms: permeation. · · Noun Definition 2 Synonyms · · · permeation · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074