An enormity is something extreme or huge, almost beyond comprehension. If you call having to paint the house all by yourself an enormity, your friends might take pity on you and show up with brushes and rollers.
Something that's enormous can be good — a huge paycheck! — or bad, such as a tumor. But when it comes to enormity, some word lovers are up in arms. The word originally meant "a crime," so some people think it should only be used to describe wickedness or lack of morals. Others can't resist the word's similarity to enormous and apply it to anything vast, positive or negative.