Autocorrelation Serial Correlation and Multicollinearity

[Sunita Arora]

Sometimes there is confusion about the use of these terms though the terms autocorrelation and serial correlation are used interchangeably.
My knowledge says
1. When a series is correlated with its lag values, this type of correlation is termed as autocorrelation.
2. When a series is correlated with the lag values of other series, this type of correlation is termed as serial correlation.
3. When different series are correlated without lags, this type of correlation is termed as Multicollinearity.
Waiting for Expert's/Experts' comments.

Regards
Dr. Sunita Arora
Associate Professor
GCW, Rohtak