Definition of “complex” - English Dictionary

“complex” in British English

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uk /ˈkɒm.pleks/ /kəmˈpleks/ us /kɑːmˈpleks/ /ˈkɑːm.pleks/

B2 involving a lot of different but related parts:

a complex network of roads
a complex procedure
The company has a complex organizational structure.

B2 difficult to understand or find an answer to because of having many different parts:

It's a very complex issue to which there is no straightforward answer.
The film's plot was so complex that I couldn't follow it.

More examples

complexnoun [ C ]

uk /ˈkɒm.pleks/ us /ˈkɑːm.pleks/

(Definition of “complex” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“complex” in American English

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us /kəmˈpleks, ˈkɑm·pleks/

having many parts related to each other in ways that may be difficult to understand:

The question of who is legally responsible is a complex issue.
noun [ C/U ] us /kəmˈplek·sɪ·t̬i/

[ U ] You must understand the variety and complexity of tasks assigned to the police.

complexnoun [ C ]

us /ˈkɑm·pleks/

complex noun [ C ] (BUILDING)

a group of buildings that are related, or a large building having different parts:

an apartment complex for elderly people

complex noun [ C ] (ATTITUDES)

a group of attitudes and feelings that influence a person’s behavior, often in a negative way:

an inferiority complex

(Definition of “complex” from the Cambridge Academic Content Dictionary © Cambridge University Press)

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