pen·e·tra·tion 
/ˌpɛnəˈtreɪʃən/ noun
plural pen·e·tra·tions /ˌpɛnəˈtreɪʃən/ noun 1 : the act of going through or into something : the act of penetrating something [noncount] ▪ Cuts in the skin could permit the penetration of bacteria into the body. ▪ the penetration of the CIA by foreign agents ▪ the penetration of the U.S. market by a foreign company [count] ▪ multiple penetrations into enemy territory 2 [noncount] formal : an ability to understand things clearly and fully
▪ a writer who analyzes the underlying causes of the recession with great penetration
▪ a writer who analyzes the underlying causes of the recession with great penetration
