Definition of look back Look back

We found 2 definitions of look back from 2 different sources.

What does look back mean?

Verb
look back - look towards one's back; "don't look back while you walk"
		look backward
		look have a certain outward or facial expression; "How does she look?"; "The child looks unhappy"; "She looked pale after the surgery"
look back - look back upon (a period of time, sequence of events); remember; "she reviewed her achievements with pride"
		review, retrospect
		think back, remember recall knowledge from memory; have a recollection; "I can't remember saying any such thing"; "I can't think what her last name was"; "can you remember her phone number?"; "Do you remember that he once loved you?"; "call up memories"