Definition of hooray in US English:

hooray

exclamation

  • 1Used to express joy or approval.

    ‘This book has won all sorts of prizes. Hooray!’
    ‘hooray for getting up late on Sunday, and doing absolutely nothing’
  • 2Australian NZ Goodbye.

    ‘Hooray George, promise you'll come back’
    farewell, adieu
    View synonyms

Origin

Late 19th century (in hooray (sense 2)): variant of hurrah.

Pronunciation

hooray

/həˈreɪ//həˈrā/