Meaning of “ambitious” - Learner’s Dictionary

ambitious

adjective uk us /æmˈbɪʃəs/
PERSON

B2 wanting to be successful or powerful:

an ambitious young lawyer
PLAN

B2 An ambitious plan will need a lot of work and will be difficult to achieve:

This is our most ambitious project so far.

(Definition of “ambitious” from the Cambridge Learner’s Dictionary © Cambridge University Press)