'Door' in the Bible

Then Peter said to her, “Why is it that you have agreed together to put the Spirit of the Lord to the test? Behold, the feet of those who have buried your husband are at the door, and they will carry you out as well.”

On the very night when Herod was about to bring him forward, Peter was sleeping between two soldiers, bound with two chains, and guards in front of the door were watching over the prison.

When he knocked at the door of the gate, a servant-girl named Rhoda came to answer.

But Peter continued knocking; and when they had opened the door, they saw him and were amazed.

When they had arrived and gathered the church together, they began to report all things that God had done with them and how He had opened a door of faith to the Gentiles.