poorly stated or described
"he confuses the reader with ill-defined terms and concepts"
not clear to the mind
"the law itself was unclear on that point"
"the reason for their actions is unclear to this day"
Ambiguous; liable to more than one interpretation.
"The judge's ruling was unclear, leaving lawyers unsure of how it would be applied in future cases."
In plain English: Unclear means something is not easy to see, hear, or understand because it looks fuzzy or confusing.
"The instructions were unclear, so I decided to call for help."
Usage: Use unclear when something lacks clarity or can be understood in multiple ways, rather than simply meaning it is difficult to see. This adjective applies specifically to ideas, instructions, or statements that are ambiguous and open to different interpretations.
The word unclear comes from Middle English, where it was formed by adding the prefix un- to clear. It has traveled into modern usage with its original meaning of not being distinct or easy to understand.