When solid objects collide or run into one another–usually by accident–you can use the word "crash." This word can be a verb, a noun, or an adjective:
Two cars crashed at the intersection. (verb)
There was a car crash at the intersection. (noun)
The police appeared at the crash site. (adjective)
There are many popular ways to use this word. In these examples, "crash" is a verb:
Do you mind if I crash on your couch tonight? I’m too tired to drive. (crash = sleep)
The stock market crashed last week. (crash = stocks or bonds lose value very quickly)
My computer is going to crash if I try to use this program. (crash = a computer does too many things simultaneously and stops working.)
A drunken couple crashed the wedding reception and were kicked out of the banquet hall. (crash = go to a party uninvited.)
He crashed while skiing.
In these sentences, "crash" is a noun:
A violent crash outside of the building resulted in two fatalities.
A stock market crash was predicted by only a few experts before it happened.
Charles got into a crash, but he’s okay.
In these sentences, "crash" is an adjective:
Investigators surveyed the damage at the crash site.
Some rich guy is using the apartment downstairs as a crash pad on days when he doesn’t want to drive back to the suburbs. (crash pad = an apartment or condo used for sleeping or temporary living, usually used by someone who has a lot of money.)
He crashed while skiing.