|Origin:||complexus, past participle of complecti 'to include (many different things)', from com- ( COM-) + plectere ( PLEXUS)|
com‧plex1 S3 W2
consisting of many different parts and often difficult to understand [= complicated; ≠ simple]:
a complex system of highways
Photosynthesis is a highly complex process.
Peter seemed to have an instant understanding of the most complex issues.
It was a very complex relationship between two complex people.
a complex word or sentence contains a main part and one or more other parts [↪ compound]