Definition of "Tumble" :
noun: a sudden drop from an upright position
noun: an acrobatic feat of rolling or turning end over end
verb: do gymnastics, roll and turn skillfully
verb: suffer a sudden downfall, overthrow, or defeat
verb: put clothes in a tumbling barrel, where they are whirled about in hot air, usually with the purpose of drying
"Wash in warm water and tumble dry."
verb: fall suddenly and sharply
"Prices tumbled after the devaluation of the currency."
verb: understand, usually after some initial difficulty
verb: throw together in a confused mass
"They tumbled the teams with no apparent pattern."
verb: roll over and over, back and forth
verb: fall down, as if collapsing
"The tower of the World Trade Center tumbled after the plane hit it."
verb: fall apart
verb: fly around
"The clothes tumbled in the dryer."
verb: cause to topple or tumble by pushing