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complex

com·plex [ kəm pléks ]


adjective 
Definition:
 
1. complicated: difficult to analyze, understand, or solve

2. having many parts: made up of many interrelated parts



noun  (plural com·plex·es)
Definition:
 
1. interconnected whole: a whole composed of various interrelated parts
a building complex

2. influence on behavior: a set of related feelings, ideas, or impulses that may be repressed but continues to influence thoughts and behavior
a guilt complex

3. exaggerated feelings: an exaggerated or obsessive set of feelings about something ( informal )
He has a complex about eating in restaurants.

4. chemistry compound of nonmetal and metal atoms: a compound in which nonmetal molecules or ions form weak bonds coordinate bonds with a central metal atom

[Mid-17th century. Directly or via French< Latin complexus, past participle of complecti "weave together" < plectere "to plait"]

com·plex·ly adverb
com·plex·ness noun
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