Meaning of “subdivide” - Learner’s Dictionary

subdivide

verb [ T ] uk us /ˌsʌbdɪˈvaɪd/

to divide something into smaller parts:

[ often passive ] Each chapter is subdivided into smaller sections.
subdivision uk us /ˌsʌbdɪˈvɪʒən/ noun [ C, U ]

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