colossal success

Translations
колоссальный успех
The event was a colossal success, attracting thousands of visitors.
Мероприятие было колоссальным успехом, привлекая тысячи посетителей.
Definitions
A colossal success refers to an achievement or outcome that is extremely large, impressive, or significant, often exceeding expectations and having a major impact.
Words
success

noun
успех
colossal

adjective
колоссальный