collapse

From Latin collāpsus (past participle of collābor).

• IPA^(key): /k(ə)ˈlæps/

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• Rhymes: -æps

collapse (third-person singular simple present collapses, present participle collapsing, simple past and past participle collapsed)

1. (intransitive) To break apart and fall down suddenly; to cave in.
   • 1843, Samuel Maunder, The Scientific and Literary Treasury:

     A balloon collapses when the gas escapes from it.

2. (intransitive) To cease to function due to a sudden breakdown; to fail suddenly and completely.

   Pyramid schemes tend to generate profits for a while and then collapse.

   • 1988, Joseph Tainter, “Summary and Implications”, in The Collapse of Complex Societies, Cambridge: Cambridge University Press, →ISBN, page 216:

     However much we like to think of ourselves as something special in world history, in fact industrial societies are subject to the same principles that caused earlier societies to collapse.

3. (intransitive) To fold compactly.
4. (transitive, computing) In a hierarchical list (such as a directory tree or table of contents), to hide the subentries of (an entry).

   Antonym: expand

5. (intransitive, cricket) To suffer a batting collapse.
6. (transitive) To cause something to collapse.

   Hurry up and collapse the tent so we can get moving.

   • 2023 August 9, Paul Clifton, “Network News: Family-friendly travel: new standard covers pushchairs”, in RAIL, number 989, page 26:

     Thomas added: "We presented our experiences of frantically trying to collapse a pram, surrounded by loads of grumpy commuters.

7. (intransitive) To pass out and fall to the floor or ground, as from exhaustion or other illness; to faint.

   The exhausted singer collapsed on stage and had to be taken to the hospital.

collapse (countable and uncountable, plural collapses)

1. The act of collapsing.

   She suffered a terrible collapse after slipping on the wet floor.

   • 2012 April 21, Jonathan Jurejko, “Newcastle 3-0 Stoke”, in BBC Sport‎^[1]:

     The top six are assured of continental competition and after making a statement of intent against Stoke, it would take a dramatic collapse for Newcastle to surrender their place.

   • 2021 May 5, Paul Clifton, “Network News: Heathrow Western Rail Access scheme 'on hold'”, in RAIL, number 930, page 26:

     However the collapse in demand for rail and air travel caused by the pandemic has had a knock-on effect for the project's funding.

2. Constant function, one-valued function (in automata theory) (in particular application causing a reset). (Can we add an example for this sense?)
3. (cricket) Ellipsis of batting collapse.

• Capellos, escallop

• Homophones: collapsent, collapses

collapse

1. inflection of collapser:
   1. first/third-person singular present indicative/subjunctive
   2. second-person singular imperative

collāpse

1. vocative masculine singular of collāpsus