What is stipulative?

Some articles on stipulative:

On Stipulative Definitions
... Stipulative definitions of existing terms are useful in making theoretical arguments, or stating specific cases ... in a local school." Some of these are also precising definitions, a subtype of stipulative definition that may not contradict but only extend the lexical definition of a term ... used extensively in science and philosophy, are similar in some ways to stipulative definitions (although theoretical definitions are somewhat normative -more like persuasive ...
Definition
... For example, in formal languages like mathematics, a "stipulative" definition guides a specific discussion ... A stipulative definition can only be disproved by showing a logical contradiction ... Stevenson has identified persuasive definition as a form of stipulative definition which purports to state the "true" or "commonly accepted" meaning of a term, while in reality stipulating an altered use (perhaps ...