Definition of “successful” - Learner’s Dictionary

successful

adjective uk us /səkˈsesfəl/
ACHIEVEMENT

B1 achieving what you want to achieve:

If the operation is successful, she should be walking within a few months.
WORK

B2 having achieved a lot or made a lot of money through your work:

a successful businessman
POPULAR

B2 very popular:

a successful book/film
→ Opposite unsuccessful
successfully adverb

(Definition of “successful” from the Cambridge Learner's Dictionary © Cambridge University Press)