A sudden, intense, loud sound, as made for example by cymbals.
An automobile, airplane, or other vehicle accident.
A malfunction of computer software or hardware which causes it to shut down or become partially or totally inoperable.
A sudden large decline of business or the prices of stocks (especially one that causes additional failures).
(informal) A comedown from a drug.
(collective) A group of rhinoceroses.
A sudden decline in any living form's population levels, often leading to extinction.

Quick, fast, intensive, impromptu.

(intransitive) To collide with something destructively; to fall or come down violently.
(transitive) To cause something to collide with something else, especially when this results in damage.
(transitive) To hit or strike with force.
To make a sudden loud noise.
(abbreviation, alt-of, ambitransitive, ellipsis, slang) Ellipsis of gatecrash.
(transitive) To accelerate a project or a task or its schedule by devoting more resources to it.
(intransitive, slang) To make or experience informal temporary living arrangements, especially overnight.
(slang, transitive) To give, as a favor.
(intransitive, slang) To lie down for a long rest, sleep or nap, as from tiredness or exhaustion.
(intransitive) To experience a period of depression and/or lethargy after a period of euphoria, as after the euphoric effect of a psychotropic drug has dissipated.
(intransitive) To terminate or halt execution due to an exception.
(transitive) To cause an exception that terminates or halts execution.
To take a sudden and severe turn for the worse; to rapidly and catastrophically deteriorate.
(Scotland, transitive) To take a subject at higher level without having previously studied it.

crash

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