Meaning of “complex” - Learner’s Dictionary


adjective uk us /ˈkɒmpleks, kəmˈpleks/

B2 involving a lot of different but connected parts in a way that is difficult to understand:

complex details/issues
The situation is very complex.
complexity uk us /kəmˈpleksəti/ noun [ C, U ]

the quality of being complex:

the complexities of life

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