/ ˌkɒrəˈleɪʃn; NAmE ˌkɔːr-; ˌkɑːr-/ noun
[ C , U ] correlation (between A and B) | correlation (of A with B) a connection between two things in which one thing changes as the other does :
There is a direct correlation between exposure to sun and skin cancer.
the correlation of social power with wealth
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WORD ORIGIN
mid 16th cent.: from medieval Latin correlatio(n-) , from cor- together + relatio , from referre bring back, from re- back + ferre bring.