It can mean eroded, worn out, or crumbling.
(Basically it's saying that the barn is falling apart because it's so old and destroyed from weather.)
<span>Macbeth's footsteps must be stealthy. Stealthy means an act of being cautious for the person's act to be not seen or heard by someone else. In the sentence, Macbeth wanted to walk without waking anyone in the castle so he must be stealthy in his action.</span>
