Definition of “ventilation” - English Dictionary

british dictionary

“ventilation” in British English

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ventilationnoun [ U ]

uk /ˌven.tɪˈleɪ.ʃən/ us /ˌven.t̬əlˈeɪ.ʃən/

the movement of fresh air around a closed space, or the system that does this:

Her room had poor ventilation and in summer it became unbearably stuffy.
a ventilation system

(Definition of “ventilation” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)