noun

• (onomatopoeia) A loud sound, like the crashing together of metal objects; a crash.
  "I heard a clash from the kitchen, and rushed in to find the cat had knocked over some pots and pans."
• (sports) match; a game between two sides.
  "But they ran out of time and inspiration as Les Bleus set up a deserved semi-final clash with Wales."
• (hurling) An instance of restarting the game after a "dead ball", where it is dropped between two opposing players, who can fight for possession.
• (Scotland) Chatter; gossip; idle talk.

verb

• (intransitive) To make a clashing sound.
  "The cymbals clashed."
• (transitive) To cause to make a clashing sound.
  "Thorfinn clashed his shield against Vallon's and swung his axe to hook Vallon's ankle."
• (intransitive) To come into violent conflict.
  "Fans from opposing teams clashed on the streets after the game."
• (intransitive) To argue angrily.
  "My parents often clashed about minor things, such as the cleaning or shopping rota."