The Collaborative International Dictionary of English v.0.48:

Handwriting \Hand"writ`ing\ (-r[imac]t"[i^]ng), n.
   1. The cast or form of writing peculiar to each hand or
      person; chirography.
      [1913 Webster]

   2. That which is written by hand; manuscript.
      [1913 Webster]

   The handwriting on the wall, a doom pronounced; an omen of
      disaster. --Dan. v. 5.
      [1913 Webster] handwritten

WordNet (r) 3.0 (2006):

handwriting
    n 1: something written by hand; "she recognized his
         handwriting"; "his hand was illegible" [syn: handwriting,
         hand, script]
    2: the activity of writing by hand; "handwriting can be slow and
       painful for one with arthritis"

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "handwriting":
   autography, calligraphy, chirography, fist, graphanalysis,
   graphology, graphometry, hand, longhand, manuscript, paleography,
   pencraft, penmanship, penscript, script, scription, scrive,
   stylography



Easton's 1897 Bible Dictionary:

Handwriting
   (Col. 2:14). The "blotting out the handwriting" is the removal
   by the grace of the gospel of the condemnation of the law which
   we had broken.


Bouvier's Law Dictionary, Revised 6th Ed (1856):

HANDWRITING, evidence. Almost every person's handwriting has something
whereby it may be distinguished from the writing of others, and this
difference is sometimes intended by the term.
     2. It is sometimes necessary to prove that a certain instrument or name
is in the handwriting of a particular person; that is done either by the
testimony of a witness, who saw the paper or signature actually written, or
by one who has by sufficient means, acquired such a knowledge of the general
character of the handwriting of the party, as will enable him to swear to
his belief, that the handwriting of the person is the handwriting in
question. 1 Phil. Ev. 422; Stark. Ev. h.t.; 2 John. Cas. 211; 5 John. R.
144; 1 Dall. 14; 2 Greenl. R. 33; 6 Serg. & Rawle, 668; 1 Nott & M'Cord,
554; 19 Johns. R. 134; Anthon's N. P. 77; 1 Ruffin's R. 6; 2 Nott & M'Cord,
400; 7 Com. Dig. 447; Bac. Ab. Evidence, M; Dane's Ab. Index, h.t.