Definition of "reservation"
reservation
/ˌɹɛzəˈveɪʃən/
noun
countable and uncountable, plural reservations
(law, politics) A power of an overseeing authority to suspend legislation in the jurisdiction being overseen pending the approval of a higher authority. Such as a provincial/state governor reserving a bill passed by the state/provincial legislature from assent, pending approval of the federal government; or a federal bill passed by federal parliament being reserved by the viceroy pending approval by the crown.