Pronunciation: (on"u-mas'tik), [key]
1. of or pertaining to proper names.
2. of or pertaining to onomastics.
3. Law.(of a signature) written in the handwriting other than that of the document, instrument, etc., to which it is appended.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.