1. not easy to understand or see clearly; confusing or vague
2. not certain or definite; uncertain

Examples

• The instructions were unclear, so I made several mistakes.
• It’s unclear whether the meeting will happen tomorrow.
• The photograph was blurry and unclear.
• Her explanation left me unclear about the next steps.
• The company’s future plans remain unclear.
• His handwriting is so unclear that I can’t read it.
• The reasons for his resignation are still unclear.