superprimary

plural superprimaries

1. USinformalA primary election for president that takes place on the same day across a wide geographic area covering many voters.

   The remainder could have a superprimary after the first 25 states vote.

   2007 November 4, “Voting? Forget the Who. It’s the How.”, in New York Times

   1 more example

   There is much debate and speculation about how the southern superprimary will actually work. Some observers argue that one unintended consequence of the regional primary will be to make it more difficult for long-shot candidacies...

   1988, Herbert B. Asher, Presidential elections and American politics

   Synonyms: megaprimary