the world > movement > motion in a certain direction > downward motion > causing to come or go down > cause to come or go down [verb (transitive)] > cause to collapse (3)
transitive. To cause to collapse, break down, fall in, or contract.
transitive. To cause (a thing) to fold, collapse, etc., in a manner suggestive of an accordion's bellows. Cf. concertina, v. 1.