"complexes" in the noun sense
1. complex, composite
a conceptual whole made up of complicated and related parts
"the complex of shopping malls, houses, and roads created a new town"
2. complex, coordination compound
a compound described in terms of the central atom to which other atoms are bound or coordinated
3. complex
psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior
4. building complex, complex
a whole structure (as a building) made up of interconnected or related structures
Source: WordNet® (An amazing lexical database of English)
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