What does the phrase fall of Rome mean?

The phrase "fall of Rome" refers to the decline and eventual collapse of the Western Roman Empire, traditionally marked by the abdication of Emperor Romulus Augustulus in AD 476. This decline was characterized by a combination of internal strife, economic troubles, military defeats, and invasions by barbarian tribes. The term is often used more broadly to symbolize the end of an era and the transition from ancient to medieval societies in Europe. It highlights themes of political decay and the fragility of civilizations.