Complex (k&obreve_;mpl&ebreve_;ks), a. [L. complexus, p. p. of complecti to entwine around, comprise; com- + plectere to twist, akin to plicare to fold. See Plait, n.] 1. Composed of two or more parts; composite; not simple; as, a complex being; a complex idea.
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Ideas thus made up of several simple ones put together, I call complex; such as beauty, gratitude, a man, an army, the universe. Locke.
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2. Involving many parts; complicated; intricate.
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When the actual motions of the heavens are calculated in the best possible way, the process is difficult and complex. Whewell.
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Complex fraction. See Fraction. -- Complex number (Math.), in the theory of numbers, an expression of the form a + b√-1, when a and b are ordinary integers.

Syn. -- See Intricate.
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