Longman Dictionary of Contemporary English homepage

complexity

noun
     
com‧plex‧i‧ty plural complexities
1 [uncountable] the state of being complicated
complexity of
There is increasing recognition of the complexity of the causes of poverty.
a design of great complexity
2 [countable usually plural] one of the many details or features of something that make it hard to understand or deal with
complexity of
The complexities of economics are clearly explained.

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