Meaning of “clash” - Learner’s Dictionary

clash

noun [ C ] uk us /klæʃ/
FIGHT

a fight or argument:

There were violent clashes between the police and demonstrators.
DIFFERENCE

a big difference between ideas or qualities that causes problems:

a clash of personalities
SOUND

a loud sound that is made when metal objects hit each other:

the clash of pans in the sink

(Definition of “clash noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)