located at the back of a boat, ship, or airplane
The stern portion of a vessel.
At, near, or towards the stern of a vessel (with the frame of reference within the vessel).
Situated at the rear; posterior.
A back gate, back door, side entrance, or other gateway distinct from the main entrance.
A subterranean passage communicating between the parade and the main ditch, or between the ditches and the interior of the outworks.