Definition of "Penetration" :
noun: the act of entering into or through something
"The penetration of upper management by women."
noun: the act (by a man) of inserting his penis into the vagina of a woman
noun: an attack that penetrates into enemy territory
noun: the depth to which something penetrates (especially the depth reached by a projectile that hits a target)
noun: the ability to make way into or through something
"The greater penetration of the new projectiles will result in greater injuries."
noun: clear or deep perception of a situation