An excited shout expressing joy, approval, or celebration.
Possibly from German 'hurra' or Russian 'ура' (hurrah). It's an exclamation that spread across many languages in the 1600s-1700s and may be imitative of enthusiastic shouting.
The three-hurrah tradition (saying it three times) became especially popular in American celebrations, influenced by military drill sergeants who used it to maintain group timing and enthusiasm.
Complete word intelligence in one call. Free tier — 50 lookups/day.