PLAIN-LANGUAGE DEFINITION
Negative constraint
A negative constraint states an element or behavior the output should avoid.
IN PRACTICE
An example
A brief can request no camera shake and no extra objects entering the frame.
What this does not tell you
Models may not honor every constraint, so inspect the result.
Use the term precisely
When you use this term in a brief or report, include the relevant source, scope and assumptions. An example explains the concept; it is not a benchmark or a promise of results.