Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Consisting of interconnected or interwoven parts; composite.
  • adj. Composed of two or more units: a complex carbohydrate.
  • adj. Involved or intricate, as in structure; complicated.
  • adj. Grammar Consisting of at least one bound form. Used of a word.
  • adj. Grammar Consisting of an independent clause and at least one other independent or dependent clause. Used of a sentence.
  • n. A whole composed of interconnected or interwoven parts: a complex of cities and suburbs; the military-industrial complex.
  • n. In psychology, a group of related, often repressed ideas and impulses that compel characteristic or habitual patterns of thought, feelings, and behavior. No longer in scientific use.
  • n. An exaggerated or obsessive concern or fear.
  • n. Medicine The combination of factors, symptoms, or signs of a disease or disorder that forms a syndrome.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Made up of multiple parts; intricate or detailed.
  • adj. Not simple or straightforward.
  • adj. Of a number, of the form a + bi, where a and b are real numbers and i is the square root of −1.
  • adj. A curve, polygon or other figure that crosses or intersects itself.
  • n. A problem.
  • n. A collection of buildings with a common purpose, such as a university or military base.
  • n. A psychologically based dislike or fear of a particular thing.
  • n. A thunderstorm that forms when two storm fronts collide.
  • n. A structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules.
  • v. To form a complex with another substance

from the GNU version of the Collaborative International Dictionary of English

  • adj. Composed of two or more parts; composite; not simple.
  • adj. Involving many parts; complicated; intricate.
  • n. Assemblage of related things; collection; complication.

from The Century Dictionary and Cyclopedia

  • Composed of interconnected parts; formed by a combination of simple things or elements; including two or more connected particulars; composite; not simple: as, a complex being; complex ideas; a complex term.
  • Involved; intricate; complicated; perplexing.
  • In the theory of numbers, any expression in the form ai + bj +, etc., where a, b, etc., are integers, and i, j, etc., are peculiar units.
  • To combine intricately; involve; mix up.
  • n. Anything consisting in or formed by the union of interconnected parts; especially, an assemblage of particulars related as parts of a system.
  • n. In geometry, a continuous, triply infinite system of infinite straight lines; the whole of any kind of forms in space fulfilling one condition: thus, all the lines that cut a given curve in space constitute a complex.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a conceptual whole made up of complicated and related parts
  • n. a compound described in terms of the central atom to which other atoms are bound or coordinated
  • n. a whole structure (as a building) made up of interconnected or related structures
  • adj. complicated in structure; consisting of interconnected parts
  • n. (psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior

Etymologies

Latin complexus, past participle of complectī, to entwine; see complect.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French complexe, from Latin complexus, past participle of complectī ("to entwine, encircle, compass, infold"), from com- ("together") and plectere ("to weave, braid"). See complect. (Wiktionary)

Examples

  • Then is Perception, in the prefent way of confidering it, faid to be fimple, when the Objeft of it is fimple, and then complex when the Objeft of it is complex* And fince the intire and ade - quate Objeft of Thought (as will hereafter ap - pear) is cpmprifed within the compafs of Ideas and of their Relations, we may more explicitly fay that then is Perception fimple when it is tlie Contemplation of Ideas only, and then complex when with the Ideas it takes in alfo the Confideration of their Relations and effen - tial Habitudes.

    An Essay Towards the Theory of the Ideal Or Intelligible World. Design'd for ...

  • 78 Day 4 The variable z so defined has now a real and an imaginary part that can be individually addressed using, respectively, the syntax: __real__ z and __imag__ z Similarly, the next declaration produces a complex variable of 32-bit integer type: __complex__ int x;

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  • I shuddered a little on encountering the phrase "complex polyvocal, transhistorical schematic."

    Keeper of the Affirming Flame

  • The term complex is used by doctors to describe a person who is between being fully alert and unconscious.

    WebMD Health

  • But believe me when I say this complex is there, an ugly little current pushing female characters toward one pole or the other.

    Virgins and whores at SF Novelists

  • The commission will also work out a strategy to tackle what it calls the "complex phenomenon" of illegal music downloading.

    EU Lays Out New Plans on Piracy, Music Rights

  • Developed by Heydey Partnership, the complex is aiming to prove that modern sustainably built homes can be affordable as well.

    Adrianne Jeffries | Inhabitat

  • Their incoming top officer, General Jim Amos, recently told an audience the Corps has long been adept at quickly solving what he called complex and nasty security problems.

    Marines Need To Regain 'Maritime Soul,' Gates Says

  • Much of it from the complex is then pre-treated and piped to the Morrisville wastewater treatment plant.

    Living High on Trash: The Falls and Tullytown PA landfill expand and accept radioactive materiel too.

  • CHRIS LAWRENCE, CNN PENTAGON CORRESPONDENT: Tony, U.S. officials are now telling CNN that the insurgents attacked these troops with what they call complex attacks, meaning that the insurgents used one or more roadside bombs in conjunction with small arms fire to attack the armored vehicles that these troops were riding in.

    CNN Transcript Oct 27, 2009

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