Exact definition of Popular Sovereignty:
Popular Sovereignty
~noun
~The doctrine that sovereign power is vested in the people and that those chosen to govern, as trustees of such power, must exercise it in conformity with the general will.
~American History. (before the Civil War) a doctrine, held chiefly by the opponents of the abolitionists, that the people living in a territory should be free of federal interference in determining domestic policy, especially with respect to slavery.