Missing Value
A field with no usable value, represented as blank, NULL or another missing marker.
Why it matters
Missing Value affects how data is matched, interpreted or acted on in real work. Understanding the term helps you choose the right tool and avoid silent assumptions in reports.
Practical check
When this concept appears in a spreadsheet, query or workflow, ask what one row represents, which values are allowed, and what should happen when data is missing or duplicated.