hooray

Multiple Entries:
  hooray    hurrah  

Concise Oxford English Dictionary © 2008 Oxford University Press:
hooray/huˈreɪ/

▶exclamation

• 1 hurrah.

• 2 Austral./NZ goodbye.

Concise Oxford English Dictionary © 2008 Oxford University Press:
hurrah /həˈrɑː/ (also hooray, hurray)

▶exclamation used to express joy or approval.

– origin C17: alt. of huzza; perh. orig. a sailors' cry when hauling.