The 2015 Iran Nuclear Deal, also known as the Joint Comprehensive Plan of Action (JCPOA), was an agreement between Iran and several world powers to limit Iran's nuclear program in exchange for sanctions relief.
Punitive measures imposed by countries or international organizations to pressure a government into changing its policies.
Nonproliferation: Efforts to prevent the spread of nuclear weapons to additional countries.
IAEA (International Atomic Energy Agency): An international organization that promotes peaceful uses of nuclear energy and verifies compliance with nonproliferation agreements.