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