complex — English Dictionary

complex
Pronunciations (6)
  • /ˈkɒmplɛks/
    Pronunciation notes
    • Received-Pronunciation
  • /kəmˈplɛks/
    Pronunciation notes
    • Received-Pronunciation
  • /kɑmˈplɛks/
    Pronunciation notes
    • General-American
  • /ˈkɑmˌplɛks/
    Pronunciation notes
    • General-American
  • kəmˈplɛks
    Pronunciation notes
    • GB
  • kəmˈplɛks
    Pronunciation notes
    • US

Adjective

  1. Made up of multiple parts; composite; not simple.

    Examples

    a complex being; a complex idea

    The human body is a complex system made up of many layers.

    More examples (1)

    Ideas thus made up of several simple ones put together, I call complex; such as beauty, gratitude, a man, an army, the universe.

  2. Not simple, easy, or straightforward; complicated.

    Examples
    More examples (1)

    If, when the actual motions of the heavens are calculated in the best possible way, the process is complex and difficult, and if we are discontented at this, nature, and not the astronomer, must be the object of our displeasure.

  3. Having the form a + bi, where a and b are real numbers and i is (by definition) the imaginary square root of −1.

    Usage
    • of a number
    Examples

    complex number

    function of a complex variable

  4. Whose range is a subset of the complex numbers.

    Usage
    • of a function
    Examples

    complex function

  5. Whose coefficients are complex numbers; defined over the field of complex numbers.

    Examples

    complex polynomial

    complex algebraic variety

  6. A curve, polygon or other figure that crosses or intersects itself.

Noun

  1. A network of interconnected systems.

    Examples

    military–industrial complex

  2. A collection of buildings with a common purpose, such as a university or military base.

    Examples
    More examples (1)

    The south polar region of Promethei Planum developed a Bermuda Triangle reputation. Satellites detected intermittent mass concentrations and magnetic field shifts. In 2148, prospectors working near Deseado Crater discovered an underground complex: a Prothean observation post. The odd phenomena were generated by the operation and discharge of a mass effect core, struggling to function despite fifty millennia of neglect.

    A man at the complex said he had seen the often heavily made-up girls coming and going in luxury vehicles.

  3. An assemblage of related things; a collection.

    Examples

    This parable of the wedding supper comprehends in it the whole complex of all the blessings and privileges exhibited by the gospel.

  4. An assemblage of related things; a collection. An organized cluster of thunderstorms.

  5. An assemblage of related things; a collection. A cluster of wildfires burning in the same vicinity.

    Examples

    The fire complex began as two separate fires.

    More examples (1)

    As of early Wednesday, there were at least 25 major wildfires and fire complexes, the term given to multiple fires in a single geographic area, burning in California, Christine McMorrow, a Cal Fire information officer, said.

  6. An assemblage of related things; a collection. A group of closely related species, often distinguished only with difficulty by traditional morphological methods.

    Examples
    More examples (1)

    Since then, a good deal of research has documented and concluded that the nominal species A. fraterculus actually comprises an unresolved complex of cryptic species.

  7. A group of emotionally charged ideas or mental factors, unconsciously associated by the individual with a particular subject, arising from repressed instincts, fears, or desires and often resulting in mental abnormality.

    Examples

    Jim has a real complex about working for a woman boss.

  8. A group of emotionally charged ideas or mental factors, unconsciously associated by the individual with a particular subject, arising from repressed instincts, fears, or desires and often resulting in mental abnormality. A fixed mental tendency or obsession.

  9. A structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules, as for example coordination compounds in inorganic chemistry and protein complexes in biochemistry.

    Examples
    More examples (1)

    Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis:[…]. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.

  10. A complex number.

    Examples

    The interesting aspect here is that U₃ is irreducible, even though all irreps over the complexes are one-dimensional because ℤ₄ is abelian.

  11. A multimorphemic word, one with several parts, one with affixes.

Verb

  1. To form a complex with another substance.

    Usage
    • Intransitive
  2. To complicate.

    Usage
    • Transitive

Adjective

  1. complicated in structure; consisting of interconnected parts

    Antonyms
    Examples

    a complex set of variations based on a simple folk melody

    a complex mass of diverse laws and customs

  2. difficult to analyze or understand

    Synonyms
    Examples

    a complicated problem

    complicated Middle East politics

    More examples (1)

    he's more complex than he seems on the surface

Noun

  1. a conceptual whole made up of complicated and related parts

    Synonyms
    Broader terms
    Examples

    the complex of shopping malls, houses, and roads created a new town

  2. a compound described in terms of the central atom to which other atoms are bound or coordinated

  3. (psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior

    Broader terms
  4. a whole structure (as a building) made up of interconnected or related structures

Word forms
more complexcomplexermost complexcomplexestcomplexescomplicescomplexescomplexingcomplexedcomplexed

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