(especially in a parliament) voting for a party one does not belong to, or for more than one party.
（尤指国会中的）跨党派投票；投一个以上党派的票
Example sentencesExamples
Philip Norton's study of the division lists in Parliaments since 1945 shows that in the Parliaments from 1970 the proportion of divisions in which cross-voting (or a member defying his whip) occurred increased.
It saw some Government employees peeping in to find out the position of the Congress and to see whether there was any cross-voting.
He said in the case of simultaneous polls, there is every chance of cross-voting and the voters end up voting for the same party.
Party leaders and backbenchers both rated cross-voting as the most serious violation of party discipline.