steps consisting of two parallel members connected by rungs; for climbing up or down
source: WordNet 3.0
ascending stages by which somebody or something can progress
He climbed the career ladder.
source: WordNet 3.0
a row of unravelled stitches
She got a run in her stocking.
source: WordNet 3.0
A frame usually portable, of wood, metal, or rope, for ascent and descent, consisting of two side pieces to which are fastened cross strips or rounds forming steps.