am·bi·tious/æm`bɪʃəs; æmˈbɪʃəs/ adj 1 determined to be successful or powerful 有抱负的，有雄心的; 野心勃勃的: He is young and very ambitious. 他年轻，而且非常有雄心。 2 an ambitious plan aims to achieve something very great but very difficult 浩大而艰巨的: the most ambitious engineering project of modern times 现代最宏伟的工程项目