definition of
[crumble]

[1] #1 crumble v. [crumple, tumble, break down, collapse] fall apart; "the building crumbled after the explosion"; "Negotiations broke down". wn

[2] #2 crumble v. [fall apart] break or fall apart into fragments; "The cookies crumbled"; "The Sphinx is crumbling". wn

[3] #3 crumble v. [decay, dilapidate] fall into decay or ruin; "The unoccupied house started to decay". wn