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stuff‧y

1 a room or building that is stuffy does not have enough fresh air in it :
It's getting stuffy in here - do you mind if I open the window?
It's getting stuffy in here - do you mind if I open the window?2 people, occasions, or places that are stuffy are too formal and old-fashioned - used to show disapproval :
Their wedding was stuffy and formal.
a stuffy old family
Their wedding was stuffy and formal.
a stuffy old family —stuffiness noun [uncountable]
the stuffiness of the room
the stuffiness of the room