Correlation of a variable with itself over a successive time or space intervals (lags).
Note: If the mean of autocorrelated data is estimated the standard deviation of the mean depends on sampling mode.
Source:
PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 408 (https://doi.org/10.1515/pac-2015-0605)