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Adjective
- not having an open mind
- a closed mind unreceptive to new ideas
- not open to the general public
- requiring union membership
- used especially of mouth or eyes
- he sat quietly with closed eyes
- his eyes were shut against the sunlight
- (set theory) of an interval that contains both its endpoints
- not open or affording passage or access
- the many closed streets made travel difficult
- our neighbors peeped from behind closed curtains