1. the quality or state of being flighty; lack of seriousness, stability, or focus; frivolousness.
Usage: uncountable; often used to describe a person's character or behavior
2. a tendency to be easily distracted or to change one's mind or attention frequently.
Usage: uncountable

Examples

• Her flightiness made it hard for her to stick with one hobby for more than a few weeks.
• The teacher was frustrated by the student's flightiness during important lessons.
• His flightiness in relationships meant he rarely stayed with one partner for long.
• Despite her intelligence, her flightiness prevented her from achieving her academic goals.
• The flightiness of the committee members delayed the project by several months.
• She tried to overcome her natural flightiness by keeping detailed schedules and reminders.