an event in which people fight on horses using a long stick (= a lance) to try to knock the other person off their horse, especially as part of a formal contest in the past （尤指旧时作为正式比赛一部分的）马上长矛打斗，骑马比武 a medieval joust 中世纪的争斗
- (formal)
an act of arguing with somebody, especially as part of a formal or public debate （尤指作为正式或公开辩论一部分的）辩论，讨论，争论 the weekly verbal joust called Prime Minister's Questions 每周的口头辩论被称为总理的问题