Definition of tailspin noun from the Oxford Advanced American Dictionary

     

    tailspin

     noun
    noun
    NAmE//ˈteɪlspɪn//
     
    [singular]
     
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  1. 1a situation in which a pilot loses control of an aircraft and it spins as it falls quickly toward the ground, with the back making larger circles than the front to go into a tailspin
  2. 2a situation that suddenly becomes much worse and is not under control Following the announcement, share prices went into a tailspin.
See the Oxford Advanced Learner's Dictionary entry: tailspin