#1 tumble v. [topple] fall down, as if collapsing; "The tower of the World Trade Center tumbled after the plane hit it". wn
#2 tumble v. [topple, tip] cause to topple or tumble by pushing. wn
#3 tumble v. roll over and over, back and forth. wn
#4 tumble n. an acrobatic feat of rolling or turning end over end. wn
#5 tumble v. [whirl, whirl around] fly around; "The clothes tumbled in the dryer"; "rising smoke whirled in the air". wn
vizzz