to make a loud, clattering noise, as of something dashed to pieces.
to break or fall to pieces with noise.
(of moving vehicles, objects, etc.) to collide, especially violently and noisily.
to move or go with a crash; strike with a crash.
Aeronautics. to land in an abnormal manner, usually causing severe damage: The airliner crashed.
to collapse or fail suddenly, as a financial enterprise: The stock market crashed.
Informal. to gain admittance to a party, performance, etc., without an invitation, ticket, or permission.
Slang.
to sleep.
to have a temporary place to sleep or live without payment: He let me crash at his house.
to fall asleep: I get home in the evening and I just crash till it's time for dinner.
Slang. to experience unpleasant sensations, as sudden exhaustion or depression, when a drug, especially an amphetamine, wears off.
Medicine/MedicalSlang. to suffer cardiac arrest.
Ecology. (of a population) to decline rapidly.
Computers. to shut down because of a malfunction of hardware or software.
verb (used with object)
to break into pieces violently and noisily; shatter.
to force or drive with violence and noise (usually followed by in, through, out, etc.).
Aeronautics. to cause (an aircraft) to make a landing in an abnormal manner, usually damaging or wrecking the aircraft.
Informal.
to gain admittance to, even though uninvited: to crash a party.
to enter without a ticket, permission, etc.: to crash the gate at a football game.
noun
a sudden loud noise, as of something being violently smashed or struck: the crash of thunder.
a breaking or falling to pieces with loud noise: the sudden crash of dishes.
a collision or crashing, as of automobiles, trains, etc.
the shock of collision and breaking.
a sudden and violent falling to ruin.
a sudden general collapse of a business enterprise, prosperity, the stock market, etc.: the crash of 1929.
Aeronautics. an act or instance of crashing.
Ecology. a sudden, rapid decline in the size of a population.
adjective
characterized by an intensive effort, especially to deal with an emergency, meet a deadline, etc.: a crash plan to house flood victims; a crash diet.
Origin of crash
1
First recorded in 1350–1400; 1920–25 for def. 16; 1870–75 for def. 22; Middle English crasche, blend of crase “to break” and masche “to crush, pulp”; see origin at craze,mash1