come back in WordNet English dictionary

1. be restored
   "Her old vigor returned"
   come back  return 
   
2. go back to something earlier
   "This harks back to a previous remark of his"
   hark back  return  come back  recall 
   
3. answer back
   retort  come back  repay  return  riposte  rejoin 
   
4. even the score, in sports
   come back 
   

come back in English Wiktionary