[1] : The Collaborative International Dictionary of English v.0.48

re-ally \re"-ally"\ -limac", v. t. pref. re- + ally, v.
   t.
   to bring together again; to compose or form anew. --spenser.
   1913 webster

[2] : The Collaborative International Dictionary of English v.0.48

really \re"ally`\ r=a"aumll=e`, adv.
   royally. obs. --chaucer.
   1913 webster

[3] : The Collaborative International Dictionary of English v.0.48

really \re"ally\ r=e"ally^, adv.
   in a real manner; with or in reality; actually; in truth.
   1913 webster

         whose anger is really but a short fit of madness.
                                                  --swift.
   1913 webster

   note: really is often used familiarly as a slight
         corroboration of an opinion or a declaration.
         1913 webster

               why, really, sixty-five is somewhat old. --young.
         1913 webster

[4] : WordNet (r) 2.0

really
     adv 1: in accordance with truth or fact or reality; "she was now
            truly american"; "a genuinely open society"; "they
            don't really listen to us" syn: truly, genuinely
     2: in actual fact; "to be nominally but not actually
        independent"; "no one actually saw the shark"; "large
        meteorites actually come from the asteroid belt" syn: actually
     3: 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" syn: in truth, truly
     4: 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" syn: very, real, rattling
see also:
truly genuinely actually in truth very real 
rattling 

[5] : Moby Thesaurus II by Grady Ward, 1.0

123 moby thesaurus words for "really":
   ok, roger, absolutely, actually, all right, almighty, alright,
   alrighty, amen, as you say, assuredly, at bottom, authentically,
   awfully, aye, by all means, categorically, certainly, clearly, da,
   de facto, decidedly, definitely, demonstrably, doubtlessly, easily,
   exactly, exceedingly, exceptionally, extraordinarily, extremely,
   factually, fine, for a certainty, for real, forsooth, genuinely,
   good, good enough, hear, historically, honestly, in actuality,
   in all conscience, in effect, in fact, in reality, in truth,
   in very sooth, indeed, indeedy, indubitably, ja, just, just so,
   legitimately, mais oui, manifestly, mightily, mighty,
   most assuredly, naturally, naturellement, nothing else but,
   noticeably, observably, obviously, of a truth, of course, okay,
   only too, oui, patently, positively, powerful, powerfully,
   precisely, pretty, quite, rather, real, really-truly, remarkably,
   right, righto, sensibly, seriously, so, sure, sure thing, surely,
   terribly, terrifically, to be sure, truly, unaffectedly,
   unambiguously, unassumedly, uncommonly, undeniably, undoubtedly,
   unmistakably, unquestionably, unusually, veridically, verily,
   veritably, very, very well, visibly, warts and all, well and good,
   why yes, with truth, without doubt, yea, yeah, yep, yes,
   yes indeed, yes indeedy, yes sir, yes sirree

[6] : THE DEVIL'S DICTIONARY ((C)1911 Released April 15 1993)

really, adv.  apparently.

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