Source : Webster's Revised Unabridged Dictionary (1913)

Doorway \Door"way`\, n.
   The passage of a door; entrance way into a house or a room.

Source : WordNet®

doorway
     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; "he stuck his head in the doorway" [syn: {door}, {room
         access}, {threshold}]