collapse
Americanverb (used without object)
-
to fall or cave in; crumble suddenly.
The roof collapsed and buried the crowd.
-
to be made so that sections or parts can be folded up, as for convenient storage.
This bridge table collapses.
-
to break down; come to nothing; fail.
Despite all their efforts the peace talks collapsed.
-
to fall unconscious or as if unconscious or physically depleted, as from a stroke, heart attack, disease, or exhaustion.
-
Pathology.
-
to sink into extreme weakness.
-
(of lungs) to come into an airless state.
-
verb (used with object)
noun
-
a falling in or together.
Three miners were trapped by the collapse of the tunnel roof.
-
a sudden, complete failure; breakdown.
The bribery scandal brought about the complete collapse of his industrial empire.
verb
-
(intr) to fall down or cave in suddenly
the whole building collapsed
-
(intr) to fail completely
his story collapsed on investigation
-
(intr) to break down or fall down from lack of strength
-
to fold (furniture, etc) compactly or (of furniture, etc) to be designed to fold compactly
noun
-
the act or instance of suddenly falling down, caving in, or crumbling
-
a sudden failure or breakdown
Usage
What does collapse mean? Collapse means to break apart suddenly, as in The rickety bridge collapsed into the river. If something collapses, it falls apart or caves in quickly and suddenly. Usually, something collapses because it’s unable to support its own weight. Collapse can also be used figuratively to mean to fail or break down, as in The party quickly collapsed when two groups started fighting with each other. Collapse can also mean to fall unconscious or to pass out, as in The marathon runner collapsed due to heat stroke. Collapse can also be used as a noun in any of these senses, as in She determined that the coins dated back to the collapse of the Ottoman Empire. Example: I had to rebuild my house of cards after the wobbly table caused it to collapse.
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Participles
Conjugated Forms
Present
-
collapsesimple
-
collapsessimple
-
have collapsedperfect
-
has collapsedperfect
-
am collapsingprogressive
-
are collapsingprogressive
-
is collapsingprogressive
-
have been collapsingperfect progressive
-
has been collapsingperfect progressive
Past
-
collapsedsimple
-
had collapsedperfect
-
was collapsingprogressive
-
were collapsingprogressive
-
had been collapsingperfect progressive
Future
Etymology
Origin of collapse
First recorded in 1725–35; from Latin collāpsus “fallen together,” past participle of collābī “to fall down, fall together, fall into ruins,” from col- col- 1 + lābī “to fall, slide, make a mistake”
Explanation
To collapse means to fall over, cave in, or totally crumple. After finding out that the stock market has collapsed and your investments along with it, you'd probably collapse to the ground and sob uncontrollably. From the Latin collapsus, meaning “fall together," comes our English collapse, a word that functions as both noun and verb. Empires collapse after revolutions, and your dog will eventually collapse from exhaustion if he keeps chasing his tail in circles. But if a company falls apart after the boss retires, or you have a total breakdown cramming for exams, that's a kind of collapse, too.
Vocabulary lists containing collapse
The Great Depression and The New Deal
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
"A Retrieved Reformation" by O. Henry
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
Ghost Boys
Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They needed to douse the fire before it spread further to wooden structures that could have caused the whole cathedral to collapse.
From The Wall Street Journal • Jun. 18, 2026
That’s partly because memory is essentially a commodity: Prices surge when demand surpasses supply, and collapse when it doesn’t.
From MarketWatch • Jun. 18, 2026
The affair erupted in November with the collapse of Banco Master, crushed under the weight of $7 billion in debt to 800,000 depositors who were later reimbursed by the government.
From Barron's • Jun. 18, 2026
This collapse was due to a combination of Iranian attacks on commercial shipping that began shortly after the war started and a US blockade of Iranian ports.
From BBC • Jun. 18, 2026
Hazel also knew that the instant her own concentration wavered and that darkness touched her, she would collapse.
From "The House of Hades" by Rick Riordan
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
