1. the state of being unsure or not knowing what will happen
2. something that is not known or definite

Examples

• There is uncertainty about the weather forecast for tomorrow.
• The uncertainty of the job market makes planning difficult.
• She faced the future with uncertainty and anxiety.
• Economic uncertainty has affected consumer spending.
• The test results created uncertainty among the students.
• Political uncertainty led to market volatility.
• His uncertainty about the decision was obvious to everyone.