معنی کلمه :‌ postern

Back; being behind; private.

Originally, a back door or gate; a private entrance; hence, any small door or gate.

An extensive order of bony fishes including most of the common market species, as bass, salmon, cod, perch, etc.

A subterraneous passage communicating between the parade and the main ditch, or between the ditches and the interior of the outworks.