Meaning of “transform” - Learner’s Dictionary

transform

verb [ T ] uk us /trænsˈfɔːm/

B2 to change something completely, usually to improve it:

Within weeks they had transformed the area into a beautiful garden.
transformation uk us /ˌtrænsfəˈmeɪʃən/ noun [ C, U ]

a complete change:

The company has undergone a dramatic transformation in the past five years.

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