Way; road; path; channel or course through or by which one passes; way of exit or entrance; way of access or transit. Hence, a common avenue to various apartments in a building; a hall; a corridor.

A straight, winding or angular cave path of narrow width compared with other parts of the cave system. This path does not have to be high, as only the length matters.

in a cave, the corridor created by water and rock falls.

An individual corridor within a Maze down which one may travel. A passage has walls on either side of it and at its ends are nodes, i.e. either junctions, dead ends, rooms, or points on the boundary wall.

A cavity in a cave that is longer than it is wide or high. A passage normally leads to other places in a cave, and is not a dead end.