referendum
Pronunciation:
/ˌɹɛfəˈɹɛndəm/noun
Definitions
A direct popular vote on a proposed law or constitutional amendment. The adposition on is usually used before the related subject of the vote.
An action, choice, etc., which is perceived as passing judgment on another matter.
Example: My father is taking my decision on whether to go to university as a referendum on his performance as a parent, and it's very stressful.