pen ‧ e ‧ tra ‧ tive /ˈpenətrətɪv, ˈpenɪtrətɪv $ -treɪtɪv/ BrE AmE adjective
1 . penetrative sex sex in which a man puts his ↑ penis into a woman’s ↑ vagina or into someone’s ↑ anus
2 . able to get into or through something easily:
penetrative missiles
3 . showing an ability to understand things quickly and completely:
penetrative observations