impersonate in WordNet English dictionary

1. pretend to be someone you are not; sometimes with fraudulent intentions
   "She posed as the Czar's daughter"
   pose  impersonate  personate 
   
2. represent another person with comic intentions
   impersonate 
   
3. assume or act the character of
   "She impersonates Madonna"; "The actor portrays an elderly, lonely man"
   impersonate  portray