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

 

pressurization

 noun
(British English also -isation)noun
BrE BrE//ˌpreʃəraɪˈzeɪʃn//
 
; NAmE NAmE//ˌpreʃərəˈzeɪʃn//
 
[uncountable]
 
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the act of keeping the air pressure in a submarine, an aircraft, etc. the same as it is on earth