The Collaborative International Dictionary of English v.0.48:
Doorway \Door"way`\, n. The passage of a door; entrance way into a house or a room. [1913 Webster]WordNet (r) 3.0 (2006):
doorway n 1: 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: doorway, door, room access, threshold]