a natural event caused by something suddenly falling down or caving in; "the roof is in danger of collapse"; "the collapse of the old star under its own gravity"突然倒れる、または崩れ落ちることによって引き起こされる、自然の事象陥落
例:The collapse of the old star under its own gravity. 自身の重力のもとでの古い星の崩壊。
collapse due to fatigue, an illness, or a sudden attack疲労、病気、または急襲による崩壊頽れる
the act of throwing yourself down; "he landed on the bed with a great flop"ごろりと横になる行為陥没
fall apart; "the building crumbled after the explosion"; "Negotiations broke down"砕ける瓦解
lose significance, effectiveness, or value; "The school system is collapsing"; "The stock market collapsed"重要性、効果または価値を失う崩壊