Autocorrelation vs. Correlation

Difference Between Autocorrelation and Correlation
Autocorrelationnoun
The cross-correlation of a signal with itself: the correlation between values of a signal in successive time periods.
Correlationnoun
A reciprocal, parallel or complementary relationship between two or more comparable objects
Correlationnoun
(statistics) One of the several measures of the linear statistical relationship between two random variables, indicating both the strength and direction of the relationship.
Correlationnoun
(algebra) An isomorphism from a projective space to the dual of a projective space, often to the dual of itself.
Correlationnoun
a reciprocal relation between two or more things
Correlationnoun
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?Correlationnoun
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