apparently a primary word (compare "door"); a portal or entrance (the opening or the closure, literally or figuratively):--door, gate.
a door
the vestibule
used of any opening like a door, an entrance, way or passage into
in a parable or metaphor
the door through which sheep go in and out, the name of him who brings salvation to those who follow his guidance
"an open door" is used of the opportunity of doing something
the door of the kingdom of heaven (likened to a palace) denotes the conditions which must be complied with in order to be received into the kingdom of God