0 a short remark or message added to the bottom of a letter after you have signed your name, usually introduced by the abbreviation PS -- postdata
1 a short message written after the main part of a letter, indicated by the letters P.S -- posdata [ feminine, singular ]
She mentioned the news in a postscript. Ella mencionó la noticia en una posdata.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Podemos completarlo paso a paso, por muy largo que sea el camino, y no se puede completar, por corto que sea el camino, si ni siquiera marcas tu huella.