correlation meaning and definition

CORRELATION noun

Definition of correlation (noun)

1. a reciprocal relation between two or more things
   • synonyms: correlativity
2. 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: coefficient of correlation, correlation coefficient
3. 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