closed

be a closed book

to be something that you know or understand nothing about. I'm afraid physics will always be a closed book to me. (usually + to)

See also: book

behind closed doors

if something is done behind closed doors, it is done in private. The United Nations Security Council met behind closed doors in New York.

See also: behind, door

closed-door

a closed-door event is one that is secret and not open to the public. At a special closed-door session of the UN, the ambassador confirmed the withdrawal of his country's troops. (always before noun)

someone could do something with their eyes closed/shut

if someone could do something with their eyes shut, they can do it very easily, usually because they have done it so many times before. I've driven along this route so often, I could do it with my eyes shut.

See also: could, eye, shut

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behind closed doors

privately or secretly. The serious meetings took place behind closed doors and not during social events. Politicians still decide on candidates behind closed doors.

See also: behind, door

do something with your eyes closed

to do something very easily. I've filled in this form so many times, I can do it with my eyes closed.

See also: eye