To be out of the loop means not being included in information or decisions that other people know about. A person who is out of the loop does not know what is going on.
The expression likely comes from the idea of a communication loop or chain where information passes between people. If someone is outside that loop, the information never reaches them.
The expression likely comes from the idea of a communication loop or chain where information passes between people. If someone is outside that loop, the information never reaches them.
I was out of the loop about the plan until someone mentioned it at lunch.