look on in WordNet English dictionary

1. look on as or consider
   "she looked on this affair as a joke"; "He thinks of himself as a brilliant musician"; "He is reputed to be intelligent"
   think of  repute  regard as  look upon  look on  esteem  take to be 
   
2. observe with attention
   "They watched as the murderer was executed"
   watch  look on 
   

look on in English Wiktionary