1. A large-scale, challenging undertaking that requires significant resources, effort, and determination to accomplish
The company launched an ambitious project to revolutionize renewable energy technology.
A empresa lançou um projeto ambicioso para revolucionar a tecnologia de energia renovável.
2. An endeavor with high goals and aspirations that may be difficult to achieve
The ambitious project aimed to build a bridge connecting the two islands.
O projeto ambicioso visava construir uma ponte conectando as duas ilhas.