C2 [ I usually + adv/prep ] to fight or argue打斗，打架；发生冲突；争论，争辩
[ I ] If two opinions, statements, or qualities clash, they are very different from each other.（两种意见、声明或品质）有分歧，不相容，相抵触
[ I ] If two people or teams clash in a sports competition or race, they compete seriously against each other.（在比赛中）激烈竞争
C2 [ I not continuous ] If colours or styles clash, they look ugly or wrong together.（颜色或风格）不协调，不搭配，不和谐
C2 [ I not continuous ] UK If two events clash, they happen at the same time in a way that is not convenient.（时间上）相冲突，相矛盾
[ I or T ] to make a loud noise like metal hitting metal, or to cause something to make this noise（使金属）砰地相碰撞；（使）碰撞作响
C2 [ C ] a fight or argument between people冲突；打斗；争论，争执
C2 [ C usually singular ] a situation in which people's opinions or qualities are very different from and opposed to each other（观点或品质等的）分歧，抵触，冲突，巨大差异
The final will be a clash of the titans.
There was a violent clash between rival supporters after the match.
The fear is that these minor clashes may develop into all-out confrontation.
Border clashes have led to increased friction between the two countries.
30 demonstrators were killed in clashes with the security forces over the weekend.
[ C ] a sports competition or race between two people or teams竞争，竞赛
[ C ] the fact of colours or styles looking ugly or wrong together（颜色或风格）不协调，不搭配，不和谐
[ C ] UK the situation when two events happen at the same time in a way that is not convenient（时间上的）冲突，矛盾
[ C ] a loud noise that sounds like metal hitting metal（金属）相碰撞的声音