1
general::
1. Remember or think about the past, as in When Mom looked back on the early days of their marriage, she wondered how they'd managed with so little money. [Late 1500s] 2. not look back;never look back. Never show signs of interrupted progress, never return to past circumstances. For example, Once he'd won the Pulitzer Prize, he never looked back. [Late 1800s]
American Heritage Idioms
2
general::
Phrase(s): look back (at someone or something) [and] look back (on someone or something)
1. Lit. to gaze back and try to get a view of someone or something. • She looked back at the city and whispered a good-bye to everything she had ever cared for. • I went away and never looked back. 2. Fig. to think about someone or something in the past. • When I look back on Frank, I do remember his strange manner, come to think of it. • When I look back, I am amazed at all I have accomplished.
McGrawhill's American Idioms And Phrasal Verbs