Q: I have always used the word “doorway” to describe the opening where a door might be located, whether or not there is a door. For example, a door-less passageway between rooms. Is this correct or should another term be used?
A: We’ve checked eight standard dictionaries and most of them define “doorway” as an opening with a door. However, several accept a door-less “doorway.” In fact, the two dictionaries we use the most differ on this.
Merriam-Webster’s Collegiate Dictionary (11th ed.) defines it as “the opening that a door closes; esp. an entrance into a building or room.” However, The American Heritage Dictionary of the English Language (5th ed.) doesn’t mention a door in its definition: “The entranceway to a room, building, or passage.”
Several dictionaries also include a figurative sense of “doorway” as an opportunity for success or a means of access or escape. Oxford Dictionaries online offers “the doorway to success” as an example, while the Collins English Dictionary offers “a doorway to freedom.”
Is it correct, you ask, to use “doorway” for an opening that could have a door but doesn’t? With standard dictionaries divided on the issue, it’s your call.
We see nothing wrong with this casual use of “doorway” for a door-less opening between rooms. But in formal English it might be better to use a word like “entry,” “entrance,” “opening,” “entranceway,” or “exit” for such a passageway.
The Oxford English Dictionary, an etymological dictionary based on historical evidence, defines “doorway” as the “opening or passage which a door serves to close or open; the space in a wall occupied by a door and its adjuncts; a portal.”
The earliest example for the usage in the OED is from “The Ruined Cottage,” a 1799 poem by Robert Southey: “I remember her / Sitting at evening in that open door-way / And spinning in the sun.” (We’ve expanded the citation to add context.)
As you would imagine, the word “door” is much older, dating back to Anglo-Saxon times, when it was written duru in Old English.
The oldest example in the OED is from Beowulf, which is believed to date from the early 700s: “Duru sona onarn fyrbendum fæst” (“The door, fastened with fire-forged bonds, swung open at once”).
from Grammarphobia http://www.grammarphobia.com/blog/2017/01/doorway.html