1. not serious; lacking gravity, importance, or earnestness
2. not causing concern or requiring urgent attention
Usage: often used in medical contexts

Examples

• The doctor assured her that the injury was nonserious.
• He made a few nonserious comments to lighten the mood.
• The damage to the car was nonserious and easily repaired.
• She preferred nonserious books for vacation reading.
• The meeting covered only nonserious matters today.
• His nonserious attitude annoyed his colleagues.
• The symptoms appeared to be nonserious but worth monitoring.