From The Collaborative International Dictionary of English v.0.48:
Non \Non\ (n[o^]n), a.
No; not. See No, a. --Chaucer.
[1913 Webster]
From 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]