Definition: a series of rungs connected together, generally for expanding the range of reach available to the climb-ee
Used in a sentence: Honey, would you put the ladderladders back in the closet so I don't keep tripping on it/them*?
*This is one of those occasions where the word effects another part of the sentence. The plural-ness (what? that's a word...) of the British version necessitates using a different word for proper grammar.