Definitions

1. noun

A frightening or very unpleasant dream, or a difficult or unpleasant situation.

“Her nightmare about failing the exam kept her up all night.”

2. noun

A person, thing, or situation that causes fear, anxiety, or dread.

“The new tax laws were a nightmare for small business owners.”

3. verb

To cause someone to have a nightmare or to make a situation seem very unpleasant or frightening.

“The news about the economy will nightmare many investors.”