'Door' in the Bible

Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.

But he that entereth in by the door is the shepherd of the sheep.

Then said Jesus unto them again, Verily, verily, I say unto you, I am the door of the sheep.

I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture.

But Peter stood at the door without. Then went out that other disciple, which was known unto the high priest, and spake unto her that kept the door, and brought in Peter.

Then saith the damsel that kept the door unto Peter, Art not thou also one of this man's disciples? He saith, I am not.