1. In accordance with truth, fact or reality
   "they don't really listen to us";
   - truly, genuinely, veritably
    
2. In actual fact
   "to be nominally but not really independent";
   - actually
    
3. (used as an intensifier or sentence modifier) in fact
   "really, you shouldn't have done it";
   - in truth, truly
    
4. Used as an intensifier
   "a really enjoyable evening";
   - very, real [N. Amer, informal], rattling [informal], thoroughly, cracking [Brit, informal], dirty [Brit, informal], mucho [informal], rotten [informal], massively [informal], jolly [Brit, informal], magnificently, splendidly, awesomely [informal], tremendously [informal]

1. Expression of doubtful interest or surprise
   - izzit [S.Africa, informal]

Encyclopedia: Really, Really Free Market