closed
/kləʊzd/adjective
1- not open关闭的, 闭合的：
rooms with closed doors lined the hallway
沿着走廊是几间关着房门的房间
he sat with his eyes closed.
他闭目坐着。
1.1
- (of a business) having ceased trading, especially for a short period（商家）（尤指短时间）歇业的：
he put the 'Closed' sign up on the door.
他把标着“停止营业”字样的牌子挂在门上。
1.2
- (of a society or system) not communicating with or influenced by others（社会, 体制）对外封闭的, 闭关自守的。
1.3
- limited to certain people; not open or available to all限于某些人的; 不是对所有人都开放的, 并非人人可得的：
the UN Security Council met in closed session.
联合国安全理事会召开内部会议。
1.4
- unwilling to accept new ideas保守的, 守旧的：
you're facing the situation with a closed mind.
你在以保守态度面对形势。
1.5
- Mathematics (of a set) having the property that the result of a specified operation on any element of the set is itself a member of the set【数】（集合）封闭的。
1.6
- Mathematics (of a set) containing all its limit points【数】（集合）包含所有极限值的。
1.7
- Geometry (of a curve or figure) formed from a single unbroken line【几何】（曲线, 图形）闭合的。
短语
behind closed doors
- taking place secretly or without public knowledge秘密地; 暗中地。
closed book
- a subject or person about which one knows nothing完全理解不了的科目; 完全理解不了的人：
accounting has always been a closed book to me.
会计学对我来说一直是一门完全理解不了的科目。