1 genuinely, actually, truly, honestly, in reality, in actuality, in (point of) fact, as a matter of fact, surely, indeed, absolutely, definitely:
Is he really going to do the high-wire act without a net?
2 indeed, actually, absolutely, unqualifiedly, positively, categorically, unquestionably, definitely, undeniably:
She is really the musical one in the family.
3 in effect, in reality, actually, in fact, de facto, in the end, at bottom, in the final analysis, at the end of the day, Colloq deep down:
Despite the sergeant's protests to the contrary, it was really Andrews who saved the platoon
4 very, extremely, quite, exceptionally, remarkably, unusually, uncommonly, extraordinarily, exceedingly, Non-Standard real:
I saw a really good film last night.