noun

• (computing) A malfunction of computer software or hardware which causes it to shut down or become partially or totally inoperable.
  "My computer had a crash so I had to reboot it."
• (finance) A sudden large decline of business or the prices of stocks (especially one that causes additional failures).
  "the stock market crash"
• (informal) A comedown from a drug.
• (collective) A group of rhinoceroses.
  "One of my favorites among the terms of groups of creatures is a crash of rhinoceros. I can imagine an African guide saying to his client, “Shoot, dammit, shoot! Here comes the whole bloody crash of rhinoceros!” […] Personally, I think I’d just as soon come across a crash of rhinoceros as a knot of toad."

verb

• (intransitive) To collide with something destructively; to fall or come down violently.
  "When the car crashed into a house, the driver was heavily injured."
• (transitive) To cause something to collide with something else, especially when this results in damage.
  "I'm sorry for crashing the bike into a wall. I'll pay for repairs."
• (transitive) To hit or strike with force.
  "Roy Hodgson's side were dominant and fully merited the lead given to them when Eric Dier crashed a 20-yard free-kick high past keeper Igor Akinfeev with 17 minutes left."
• (ambitransitive, slang) Ellipsis of gatecrash.
  "We weren't invited to the party so we decided to crash it."

noun

• (textiles) A type of rough linen.
  "The yearly allowance of clothing on this plantation, consisted of two tow-linen shirts—such linen as the coarsest crash towels are made of[…]"