The quality or capacity of being able to collapse or fold down into a smaller, more compact form.
From 'collapsable' (adjective, able to collapse) + '-ity' (noun-forming suffix), with 'collapse' from Latin 'collabi' (to fall together).
The 'collapsability' of smartphone technology—screens that fold, antennas that retract, batteries that thin out—is becoming a major engineering frontier, with Samsung and Apple pouring billions into flexible materials research.
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