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1.
The opposite of worthless. Being filled with worth.

This word was invented in the late 90's due to the problems associated with the word "worthy", which means capable or noble and "valuable" which only describes market value. Also, these words already have direct opposites such as "unworthy" and valueless.
A drink in the desert is very worthfull.

In Iraq, it is worthfull to have a flak jacket.
by Doku June 18, 2007
 
2.
Full of worth...opposite of worthless, also the word that is blurted out when you cant remember worthy.
Cameron you are so worthfull to me...*finger to mouth, is that a word?*
by Danni P November 04, 2007