Origin:
< L complexus, pp. of complecti, to encircle, embrace < com-, with + plectere, to weave: see flax
noun
a group of interrelated ideas, activities, etc. that form, or are viewed as forming, a single whole
an assemblage of units, as buildings or roadways, that together form a single, comprehensive group
Psychoanalysis
an integration of impulses, ideas, and emotions related to a particular object, activity, etc., largely unconscious, but strongly influencing the individual's attitudes and behavior