The Collaborative International Dictionary of English v.0.48:

Non \Non\ (n[o^]n), a.
   No; not. See No, a. --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Non- \Non-\ (n[o^]n-) pref. [L. non, OL. noenu, noenum, fr.
   neoenum, lit., not one. See None.]
   A prefix used in the sense of not; un-; in-; as in
   nonattention, or non-attention, nonconformity, nonmetallic,
   nonsuit.
   [1913 Webster]

   Note: The prefix non- may be joined to the leading word by
         means of a hyphen, or, in most cases, the hyphen may be
         dispensed with. The list of words having the prefix
         non- could easily be lengthened.
         [1913 Webster]

WordNet (r) 3.0 (2006):

non
    adv 1: negation of a word or group of words; "he does not speak
           French"; "she is not going"; "they are not friends"; "not
           many"; "not much"; "not at all" [syn: not, non]

Hitchcock's Bible Names Dictionary (late 1800's):

Non, posterity; a fish; eternal


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

NON. Not. When prefixed to other words, it is used as a negative as non
access, non assumpsit.