complex Definition

  • 1consisting of many different and connected parts, difficult to understand
  • 2a group of buildings or a place that is made up of several different things such as offices, shops, and homes

Using complex: Examples

Take a moment to familiarize yourself with how "complex" can be used in various situations through the following examples!

  • Example

    The instructions for assembling the furniture were too complex.

  • Example

    The human brain is a complex organ.

  • Example

    The shopping complex has a variety of stores and restaurants.

  • Example

    The political situation in the country is very complex.

complex Synonyms and Antonyms

Synonyms for complex

Antonyms for complex

Idioms Using complex

  • a complicated and interconnected system or situation


    The investigation uncovered a complex web of corruption and deceit.

  • a problem or topic that is difficult to understand or resolve


    Climate change is a complex issue that requires global cooperation and action.

  • a person with a multifaceted or intricate character


    She was a complex personality, with many different interests and passions.

Phrases with complex

  • a feeling of inadequacy or inferiority that is often accompanied by depression and anxiety


    He has an inferiority complex about his appearance.

  • a psychoanalytic theory that describes a child's feelings of desire for his or her opposite-sex parent and jealousy and rivalry with his or her same-sex parent


    The Oedipus complex is named after the Greek mythological character Oedipus, who unknowingly kills his father and marries his mother.

  • an unshakable belief characterized by consistently inflated feelings of personal ability, privilege, or infallibility


    The CEO had a God complex and believed he was always right.

Origins of complex

from Latin 'complexus', meaning 'surrounding, encompassing'


Summary: complex in Brief

The term 'complex' [ˈkɒmpleks] refers to something consisting of many different and connected parts, making it difficult to understand. It can describe physical structures like a shopping complex, or abstract concepts like the human brain. 'Complex' extends into phrases like 'inferiority complex,' and idioms like 'complex web,' denoting complicated systems or situations.

How do native speakers use this expression?