The Collaborative International Dictionary of English v.0.48:

Literally \Lit"er*al*ly\, adv.
   1. According to the primary and natural import of words; not
      figuratively; as, a man and his wife can not be literally
      one flesh.
      [1913 Webster]

   2. With close adherence to words; word by word.
      [1913 Webster]

            So wild and ungovernable a poet can not be
            translated literally.                 --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

literally
    adv 1: in a literal sense; "literally translated"; "he said so
           literally" [ant: figuratively]
    2: (intensifier before a figurative expression) without
       exaggeration; "our eyes were literally pinned to TV during
       the Gulf War"

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "literally":
   absolutely, actually, closely, dead, definitely, direct, directly,
   even, exactly, expressly, faithfully, in all respects,
   in every respect, in fact, ipsissimis verbis, just, literatim,
   plumb, point-blank, positively, precisely, really, right, rigidly,
   rigorously, square, squarely, straight, strictly, to the letter,
   truly, undeviatingly, unerringly, verbally, verbatim,
   verbatim et litteratim, word by word, word for word