noun (n)

• an attack that penetrates into enemy territory(noun.act)

  Synonym:
  incursion
  

  source: wordnet30
• clear or deep perception of a situation(noun.cognition)

  Synonym:
  insight
  

  source: wordnet30
• the act of entering into or through something(noun.act)

  Example:
  The penetration of upper management by women.
  

  source: wordnet30
• the ability to make way into or through something(noun.attribute)

  Example:
  The greater penetration of the new projectiles will result in greater injuries.
  

  source: wordnet30
• the depth to which something penetrates (especially the depth reached by a projectile that hits a target)(noun.attribute)

  source: wordnet30
• the act (by a man) of inserting his penis into the vagina of a woman(noun.act)

  source: wordnet30
• The act or process of penetrating, piercing, or entering; also, the act of mentally penetrating into, or comprehending, anything difficult.(noun)

  source: webster1913