The Collaborative International Dictionary of English v.0.48:

Likewise \Like"wise`\ (l[imac]k"w[imac]z`), adv. & conj. [See
   Wise, n.]
   In like manner; also; moreover; too. See Also.
   [1913 Webster]

         Go, and do thou likewise.                --Luke x. 37.
   [1913 Webster]

         For he seeth that wise men die; likewise the fool and
         the brutish person perish.               --Ps. xlix.
                                                  10.
   [1913 Webster]

WordNet (r) 3.0 (2006):

likewise
    adv 1: in like or similar manner; "He was similarly affected";
           "some people have little power to do good, and have
           likewise little strength to resist evil"- Samuel Johnson
           [syn: similarly, likewise]
    2: in addition; "he has a Mercedes, too" [syn: besides, too,
       also, likewise, as well]
    3: equally; "parents and teachers alike demanded reforms" [syn:
       alike, likewise]

Moby Thesaurus II by Grady Ward, 1.0:

66 Moby Thesaurus words for "likewise":
   above, additionally, again, alike, all included, along, also,
   altogether, among other things, and all, and also, and so, as is,
   as well, au reste, beside, besides, beyond, coequally,
   coextensively, coincidentally, congruently, correspondently,
   correspondingly, coterminously, ditto, either, else, en plus,
   equally, extra, farther, for lagniappe, further, furthermore, ibid,
   ibidem, identically, in addition, in kind, in like manner,
   in that way, inter alia, into the bargain, item, just the same,
   like, like that, like this, more, moreover, on the side, on top of,
   over, plus, same here, similarly, so, synonymously, the same way,
   then, therewith, thus, to boot, too, yet