penetration - definition and synonyms

noun [uncountable] 

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  1. 1
    a sexual act in which a man puts his penis into his partner’s vagina or anus
     Synonyms and related words
  2. 2
    the act of getting into a place or group

    This was in the days before the organization’s penetration into African markets.

  3. 3
    the act of getting inside something, especially past objects or substances that are intended to stop things getting inside

    The fabric could be damaged by water penetration.