Definition of tumble verb from the Oxford Advanced American Dictionary

     

    tumble

     verb
    verb
    NAmE//ˈtʌmbl//
     
    Verb Forms present simple I / you / we / they tumble
     
    he / she / it tumbles
     
    past simple tumbled
     
    -ing form tumbling
     
     
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  1. 1[intransitive, transitive] tumble (somebody/something) + adv./prep. to fall downward, often hitting the ground several times, but usually without serious injury; to make someone or something fall in this way He slipped and tumbled down the stairs.
  2. 2[intransitive] tumble (down) to fall suddenly and in a dramatic way The scaffolding came tumbling down. (figurative) World records tumbled at the last Olympics. see also tumbledown
  3. 3[intransitive] to fall rapidly in value or amount The price of oil is still tumbling.
  4. 4 [intransitive] + adv./prep. to move or fall somewhere in a relaxed, uncontrolled or noisy way I undressed and tumbled into bed. A group of noisy children tumbled out of the bus. The water tumbled over the rocks. Thick golden curls tumbled down over her shoulders. (figurative) Her words came tumbling out.
  5. 5 [intransitive] to perform acrobatics on the floor, especially somersaults (= a jump in which you turn over completely in the air) a tumbling troupe
See the Oxford Advanced Learner's Dictionary entry: tumble