Entrance (noun)

1. The act of entering a place.
2. A door, gate, or other means of access to a building or room.
3. A point at which something enters.

Origin:

From middle english, from old french, from entrer ("to enter"), from latin intrare ("to enter").

Examples:

1. The entrance to the building was on the side.
2. The main entrance was closed.
3. The entrance of the river into the sea.
4. She made an entrance.
5. He was waiting at the entrance for her.