A plebiscite is a direct vote by eligible voters to decide an important public question, such as a change to the constitution, secession, or a similar issue of national or regional importance.
The word plebiscite comes from the Latin word plebiscitum, meaning a decree of the people, with the roots plebs, "the common people," and scitum, "decree." A plebiscite can also be called a referendum. Periodically, for example, Quebec separatists hold a plebiscite to determine whether Quebec should secede from Canada. So far, the secessionists have not prevailed at the polls.