1
                           general:: 
                            Phrase(s): turn one’s back (on someone or something) 
1. Lit. to turn one’s body so that one’s back faces someone or something.  •  I turned my back on the dead horse and walked slowly away.  •  I turned my back on the shouting man and left the room. 2. Fig. to abandon or ignore someone or something.  •  Don’t turn your back on your old friends.  •  Bob has a tendency to turn his back on serious problems.  •  This matter needs your attention. Please don’t just turn your back., Phrase(s): turn someone or something back 
to cause someone or something to stop and go back; to cause someone or something to retreat.  •  The border guards turned us back because we had no passports.  •  They turned back the bus because the bridge was down., Phrase(s): turn back (from some place) 
to stop one’s journey and return.  •  We turned back from the amusement park so we could go home and get the tickets we had forgotten.  •  We turned back at the last minute.
                        
                        
 
                        
                            McGrawhill's American Idioms And Phrasal Verbs
                        
                        
                    
                    
                        2
                           general:: 
                            1. Reverse one's direction, as in We had to turn back earlier than expected. [First half of 1500s] 2. Drive someone back or away, as in They turned back anyone who didn't have an invitation, or Our forces soon turned back the enemy. [First half of 1500s] 3. Fold down, as in Turn back the page you're on to keep your place in the magazine. [Second half of 1800s]  Also see  TURN ONE'S BACK ON.
                        
                        
 
                        
                            American Heritage Idioms