definition of
really

[1] #1 really r. [truly, genuinely] in accordance with truth or fact or reality; "she was now truly American"; "a genuinely open society"; "they don't really listen to us". wn

[2] #2 really r. [actually] in actual fact; "to be nominally but not actually independent"; "no one actually saw the shark"; "large meteorites actually come from the asteroid belt". wn

[3] #3 really r. [in truth, truly] in fact (used as intensifiers or sentence modifiers); "in truth, moral decay hastened the decline of the Roman Empire"; "really, you shouldn't have done it"; "a truly awful book". wn

[4] #4 really r. [very, real, rattling] used as intensifiers; 'real' is sometimes used informally for 'really'; 'rattling' is informal; "she was very gifted"; "he played very well"; "a really enjoyable evening"; "I'm real sorry about it"; "a rattling good yarn". wn