Definition of tie-up noun from the Oxford Advanced Learner's Dictionary

     

    tie-up

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1tie-up (with somebody/something) (British English) an agreement between two companies to join together They're negotiating a tie-up with Ford.
  2. 2tie-up (between A and B) (British English) a connection between two or more things a tie-up between politics and economics
  3. 3(especially North American English) a situation in which something stops working or moving forward a traffic tie-up
See the Oxford Advanced American Dictionary entry: tie-up