dispositive adj1 : directed toward or effecting a disposition (as of a case) [an endless variety of …pretrial motions "Robert Shaw-Meadow"]
2 : relating to a disposition of property [ words in a will]
3 : providing a final resolution (as of an issue)
: having control over an outcome [ of the question]
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.