American English

Definition of penetration noun from the Oxford Advanced American Dictionary

 

penetration

 noun
noun
NAmE//ˌpɛnəˈtreɪʃn//
 
[uncountable]
 
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the act or process of making a way into or through something The floor is sealed to prevent water penetration. the company's successful penetration of overseas markets
See the Oxford Advanced Learner's Dictionary entry: penetration