What does the idiom Keep a level head mean?

"Keep a level head" means to remain calm and rational in a stressful or challenging situation. It implies that you don't let emotions or panic cloud your judgment.

Here are some synonyms for "keep a level head":

* Stay calm

* Stay composed

* Think clearly

* Be rational

* Remain objective

Example:

"It's important to keep a level head when you're driving in heavy traffic."

This means that you shouldn't get frustrated or angry, but instead focus on driving safely and responsibly.