complex
//ˈkɒmpleks//
Adjective
more complexComparative
most complexSuperlative
1
consisting of many different and connected parts; intricate or complicated
The human brain is a complex organ with billions of interconnected neurons.
2
not easy to analyze or understand; difficult
The problem is too complex for me to solve alone.
Antonym
Noun
complexesPlural
1
a group of similar buildings or facilities on the same site
The sports complex includes a swimming pool, tennis courts, and a gym.
2
a related group of emotionally significant ideas that are completely or partly repressed and that cause psychic conflict leading to abnormal mental states or behavior
He has an inferiority complex that affects his relationships.
3
a group of related things or concepts
The university has a complex of buildings dedicated to scientific research.