Adjective

• (British) IPA: /kəmˈplɛks/, /ˈkɒm.plɛks/
• (America) enPR kəmplĕks; IPA: /kəmˈplɛks/, /ˈkɑmplɛks/

Noun

• (British) IPA: /ˈkɒm.plɛks/
• (America) enPR: kŏm'plĕks, IPA: /ˈkɑmplɛks/

complex (comparative complexer, superlative complexest)

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

   a complex being; a complex idea

   • 1689 (indicated as 1690)​, [John Locke], chapter 2, in An Essay Concerning Humane Understanding. […], London: […] Thomas Basset, […], OCLC 153628242 ↗, book I, page 12 ↗:

     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.

   • When the actual motions of the heavens are calculated in the best possible way, the process is difficult and complex.

3. (mathematics) Of a number, of the form a + bi, where a and b are real numbers and i is a square root of −1.

   complex function

4. (geometry) A curve, polygon or other figure that crosses or intersects itself.

• (not simple) complicated, detailed, difficult, hard, intricate, involved, tough

• (not simple) basic, easy, simple, simplex, straightforward

• complexion
• (mathematics) symplectic

• French: complexe
• German: kompliziert
• Italian: complesso
• Portuguese: complexo
• Russian: сло́жный
• Spanish: complicado, complejo

• French: complexe
• German: kompliziert
• Portuguese: complexo, complicado
• Russian: сло́жный
• Spanish: complicado

• French: complexe
• Portuguese: complexo
• Russian: ко́мплексный
• Spanish: complexo

complex (plural complexes)

1. A problem. rfclarify en
2. A network of interconnected systems.

   military-industrial complex

3. A collection of buildings with a common purpose, such as a university or military base.
4. An assemblage of related things; a collection.

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

   1. An organized cluster of thunderstorms.
   2. (taxonomy) A group of closely related species, often distinguished only with difficulty by traditional morphological methods.
5. (psychoanalysis) An abnormal mental condition caused by repressed emotions.
6. (informal, by extension) A vehement, often excessive psychological dislike or fear of a particular thing.

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

7. (chemistry) A structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules.
8. (math) A complex number.

• Italian: complesso
• Portuguese: complexo
• Russian: ко́мплекс
• Spanish: complejo

• Italian: complesso
• Portuguese: complexo
• Russian: ко́мплекс
• Spanish: complejo

• French: complexe
• Italian: complesso
• Portuguese: composto, complexo
• Russian: ко́мплекс
• Spanish: complejo

complex (complexes, present participle complexing; past and past participle complexed)

1. (chemistry, intransitive) To form a complex with another substance
2. (transitive) To complicate.

• Italian: complessare