Definitions

1. noun

A recurrent or persistent disturbing dream or nightmare, especially one that is based on a real person, situation, or event.

“Her recurring nightmar made it hard for her to fall asleep.”

2. noun

A source of anxiety or fear.

“The nightmar of losing her job kept her up all night.”

3. verb

To cause or create a situation that causes fear, anxiety, or apprehension.

“The news of the economic downturn nightmar the entire country.”

4. verb

To have or experience a disturbing dream or nightmare.

“She often nightmares about failing her exams.”