cave in Meaning, Definition & Usage

1. noun the sudden collapse of something into a hollow beneath it
   subsidence.
   
2. verb break down, literally or metaphorically
   collapse; founder; give; give way; break; fall in.
   
   • The wall collapsed
   • The business collapsed
   • The dam broke
   • The roof collapsed
   • The wall gave in
   • The roof finally gave under the weight of the ice

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