Meaning ofstrike downin English

Verb

1. to declare something invalid (law, rule, etc.)
   The court will strike down the law if it's deemed unconstitutional.
2. to knock or push to the ground
   The boxer tried to strike down his opponent with a powerful punch.
3. to kill or cause sudden death; die instantly
   A heart attack can strike down a person without any warning signs.
4. to make someone ill or weak
   The disease can strike down even the healthiest individuals if left untreated.