Definition of permeability noun from the Oxford Advanced Learner's Dictionary

 

permeability

 noun
noun
BrE BrE//ˌpɜːmiəˈbɪləti//
 
; NAmE NAmE//ˌpɜːrmiəˈbɪləti//
 
[uncountable](specialist)
 
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the quality of allowing a liquid or gas to pass through an increase/decrease/change in permeability The force at the cell surface may change the permeability of the cell membrane.