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correlation (n.)

1560s, "mutual relation, interdependence, interconnection," from French corrélation, from cor- "together" (see com-) + relation (see relation). Meaning "action of bringing into orderly connection" is by 1879.

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Definitions of correlation from WordNet

correlation (n.)
a reciprocal relation between two or more things;
Synonyms: correlativity
correlation (n.)
a statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation);
what is the correlation between those two variables?
Synonyms: correlation coefficient / coefficient of correlation
correlation (n.)
a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other;
Synonyms: correlational statistics
From wordnet.princeton.edu