noun (n)

• the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close(noun.artifact)

  Example:
  He stuck his head in the doorway.
  

  Synonym:
  door, room access, threshold
  

  source: wordnet30
• The passage of a door; entrance way into a house or a room.(noun)

  source: webster1913