(1):
(a.) Springing from, characterized by, or indicating, ambition; showy; aspiring; as, an ambitious style.
(2):
(a.) Strongly desirous; - followed by of or the infinitive; as, ambitious to be or to do something.
(3):
(a.) Possessing, or controlled by, ambition; greatly or inordinately desirous of power, honor, office, superiority, or distinction.