say it: kuh-LAPS
collapse is a verb and noun meaning "break down, literally or metaphorically". It carries 11 recorded senses.
collapse due to fatigue, an illness, or a sudden attack
fold or close up
“fold up your umbrella”
“collapse the music stand”
fall apart
“the building crumbled after the explosion”
“Negotiations broke down”
lose significance, effectiveness, or value
“The school system is collapsing”
“The stock market collapsed”
an abrupt failure of function or complete physical exhaustion
“the commander's prostration demoralized his men”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for collapse come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.