means A small, simple structure built for storage or shelter — or, as a verb, to cast something off, like leaves, skin, or tears.

from The noun comes from Old English, likely a variant of 'shade,' since a shed was first a place that gave shelter from sun and weather. The verb 'shed' is a separate word entirely: it traces to Old English 'sceadan,' meaning to divide or separate, a cousin of German 'scheiden.' So one shed shelters you, and the other splits things apart — two unrelated words that drifted into the same spelling.