Complexity and Complex

noun

• The quality of being intricate and compounded.
  • usage: "he enjoyed the complexity of modern computers"
  • synonyms: complexness

• (n.) That which is complex; intricacy; complication.
• (n.) The state of being complex; intricacy; entanglement.

noun

• A conceptual whole made up of complicated and related parts.
  • usage: "the complex of shopping malls, houses, and roads created a new town"
  • synonyms: composite
• A compound described in terms of the central atom to which other atoms are bound or coordinated.
  • synonyms: coordination compound
• Psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior. (
• A whole structure (as a building) made up of interconnected or related structures.
  • synonyms: building complex

adjective

• Complicated in structure; consisting of interconnected parts.
  • usage: "a complex set of variations based on a simple folk melody"; "a complex mass of diverse laws and customs"

• (n.) Assemblage of related things; collection; complication.
• (n.) Composed of two or more parts; composite; not simple; as, a complex being; a complex idea.
• (n.) Involving many parts; complicated; intricate.