(uncountable) The condition of being collapsible. / (countable) The extent to which something is collapsible.

(archaic) collapse

plural of collapsibility

The belief that a system or entity will collapse.

plural of collapsible

The stage in the evolution of a star in which the pressure of the star is insufficient to maintain it at a stable size, and its material falls inward under its own gravitational attraction, eventually forming a black hole or a neutron star, and sometimes accompanied by a supernova explosion.

The point at which the assumed truths of an artificial or imagined reality are eroded to reveal actual reality.

(quantum mechanics) The phenomenon in which a wavefunction — initially in a superposition of several different possible eigenstates — appears to reduce to a single one of those states after interaction with an observer: the reduction of the physical possibilities into a single possibility as seen by an observer.

(genealogy) The phenomenon in which ancestral inbreeding causes the number of a descendant’s distinct ancestors to be smaller than that predicted by a binary tree (∑ᵢ₌₁ⁿ 2ⁱ, where n represents the number of generations).

plural of wavefunction collapse