The Collaborative International Dictionary of English v.0.48:

All \All\, adv.
   1. Wholly; completely; altogether; entirely; quite; very; as,
      all bedewed; my friend is all for amusement. "And cheeks
      all pale." --Byron.
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   Note: In the ancient phrases, all too dear, all too much, all
         so long, etc., this word retains its appropriate sense
         or becomes intensive.
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   2. Even; just. (Often a mere intensive adjunct.) [Obs. or
      Poet.]
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            All as his straying flock he fed.     --Spenser.
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            A damsel lay deploring
            All on a rock reclined.               --Gay.
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   All to, or All-to. In such phrases as "all to rent," "all
      to break," "all-to frozen," etc., which are of frequent
      occurrence in our old authors, the all and the to have
      commonly been regarded as forming a compound adverb,
      equivalent in meaning to entirely, completely, altogether.
      But the sense of entireness lies wholly in the word all
      (as it does in "all forlorn," and similar expressions),
      and the to properly belongs to the following word, being a
      kind of intensive prefix (orig. meaning asunder and
      answering to the LG. ter-, HG. zer-). It is frequently to
      be met with in old books, used without the all. Thus
      Wyclif says, "The vail of the temple was to rent:" and of
      Judas, "He was hanged and to-burst the middle:" i. e.,
      burst in two, or asunder.

   All along. See under Along.

   All and some, individually and collectively, one and all.
      [Obs.] "Displeased all and some." --Fairfax.

   All but.
      (a) Scarcely; not even. [Obs.] --Shak.
      (b) Almost; nearly. "The fine arts were all but
          proscribed." --Macaulay.

   All hollow, entirely, completely; as, to beat any one all
      hollow. [Low]

   All one, the same thing in effect; that is, wholly the same
      thing.

   All over, over the whole extent; thoroughly; wholly; as,
      she is her mother all over. [Colloq.]

   All the better, wholly the better; that is, better by the
      whole difference.

   All the same, nevertheless. "There they [certain phenomena]
      remain rooted all the same, whether we recognize them or
      not." --J. C. Shairp. "But Rugby is a very nice place all
      the same." --T. Arnold. -- See also under All, n.
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WordNet (r) 3.0 (2006):

all the same
    adv 1: despite anything to the contrary (usually following a
           concession); "although I'm a little afraid, however I'd
           like to try it"; "while we disliked each other,
           nevertheless we agreed"; "he was a stern yet fair
           master"; "granted that it is dangerous, all the same I
           still want to go" [syn: however, nevertheless,
           withal, still, yet, all the same, even so,
           nonetheless, notwithstanding]