/ ˈventɪleɪt; NAmE / verb [ vn ]
1.
to allow fresh air to enter and move around a room, building, etc. :
a well-ventilated room
The bathroom is ventilated by means of an extractor fan.
2.
( formal ) to express your feelings or opinions publicly
SYN air
► ven·ti·lation / ˌventɪˈleɪʃn; NAmE / noun [ U ]:
a ventilation shaft
Make sure that there is adequate ventilation in the room before using the paint.
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WORD ORIGIN
late Middle English (in the sense winnow, scatter ): from Latin ventilat- blown, winnowed, from the verb ventilare , from ventus wind. Sense 1 dates from the mid 18th cent.