The two I listed were the first two listed when I typed allow into google.
Even using your 3rd definition, which is to allow to happen via neglect, etc...implies that you are aware of the situation and choose to not to do something about it, or permitted a situation that reasonably would cause that situation to occur. in this instance, and your example about the TSA, while there is an assumption that someone is not following your rules, you don't know any one person for sure.
Even using your 3rd definition, which is to allow to happen via neglect, etc...implies that you are aware of the situation and choose to not to do something about it, or permitted a situation that reasonably would cause that situation to occur. in this instance, and your example about the TSA, while there is an assumption that someone is not following your rules, you don't know any one person for sure.