1. Relating to something that is merely asserted or declared with assurance in an ad hoc fashion (for a particular purpose) rather than following logically from general principles: The right to demand back payment if a contract fails is generally reserved as a stipulative condition between those who have made the arrangements.
2. A definition in which a new or currently existing term is given a new meaning for the purposes of argument or discussion in a given context: The stipulative definition in the dictionary was presented because so many publications were using the new meaning.