What does 崩壊 mean?
崩壊 is a Japanese noun meaning “collapse, decay (physics), crumbling” in English. It can also be translated as “(radioactive) decay” depending on context. It is written as 崩壊 in kanji, ほうかい in hiragana, and houkai in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
チューダー朝は１６０３年に崩壊した。
The Tudor Dynasty fell in the year 1603.