Definition

1. Adjective:

   • Complicated in structure; consisting of interconnected parts: Describes something that is not simple, but is made up of many different and connected parts, making it difficult to understand or analyze.
   • Involving many facets or aspects: Indicates that a situation, problem, or system has numerous interrelated elements.

2. Noun:

   • A whole made up of interconnected parts: A structure, system, or group composed of many related and often complicated elements.
   • (Psychology) A group of related, often repressed emotions and impulses that influence behavior: A pattern of emotions, memories, and desires, usually unconscious, that exerts a strong influence on a person's attitudes and behavior.
   • (Chemistry) A compound in which a central atom is bonded to other atoms or groups: A substance consisting of a central metal ion or atom connected to surrounding molecules or anions.

Examples of Usage

• Adjective:

  • The human brain is an incredibly complex organ.
  • The instructions for assembling the furniture were too complex for me to follow.
  • We are dealing with a complex political situation with no easy solutions.

• Noun:

  • The new sports complex includes a stadium, an arena, and several training facilities.
  • His fear of public speaking might stem from an inferiority complex.
  • Hemoglobin is an iron-containing protein complex that transports oxygen in the blood.

Advanced Usage

• "Complex of": Used to describe a group or system of interconnected things.
  • The novel explores the complex of relationships within a large family.
• "To complexify" (verb, less common): To make something more complex.
  • Adding more regulations will only complexify the process.

Variants and Related Words

• Complexity (n): The state or quality of being complex.
  • The complexity of the problem requires a team of experts.
• Complexion (n): (Note: This is a different word) The natural color and texture of the skin on a person's face.
• Complexified (adj): Made more complex.

Synonyms

• Adjective: Complicated, intricate, involved, convoluted, elaborate, sophisticated.
• Noun: System, network, structure, composite, syndrome (in psychology), facility (as in building complex).

Antonyms

• Adjective: Simple, straightforward, basic, uncomplicated, elementary.
• Noun: Simplicity, element.

Related Phrases / Idioms

• "Inferiority complex": A persistent feeling of being inferior to others.
  • His boastfulness is often a sign of an inferiority complex.
• "Superiority complex": An attitude of superiority which conceals actual feelings of inferiority.
  • She displays a superiority complex to mask her insecurities.
• "Oedipus complex": (Psychoanalysis) A complex of emotions involving sexual desire for the parent of the opposite sex and rivalry with the parent of the same sex.
• "Military-industrial complex": A country's military establishment and the industries that supply it, seen as a powerful vested interest.

Adjective

1. complicated in structure; consisting of interconnected parts
   • a complex set of variations based on a simple folk melody
   • a complex mass of diverse laws and customs

Noun

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