casting vote

1. N-COUNT When a committee has given an equal number of votes for and against a proposal, the chairperson can give a casting vote. This vote decides whether or not the proposal will be passed. (指赞成票和反对票持平时会议主席所投的) 决定票

The vote was tied and a union leader used his casting vote in favour of the return to work. 由于票数相同，一名工会领导投了决定票支持复工。