The new relationship between Québec and the rest of Canada that was turned down in a national referendum in 1980 was called:

Question

Quizplus · Accepted Answer

The term "sovereignty-association" refers to the proposal made by Québec nationalists during the 1980 referendum. It suggested that Québec become a sovereign entity while maintaining a formal association with the rest of Canada, particularly in economic matters. This proposal was rejected by the voters in the referendum.

The New Relationship Between Québec and the Rest of Canada