KJV Dictionary Definition: unworthiness unworthiness. UNWORTHINESS, n. Want of worth or merit. unworthy. UNWORTHY, a. 1. Not deserving; followed by of. As sinners, were are utterly unworthy of the divine favor. 2. Not deserving; wanting merit. Receive your unworthy son into favor. One great evil of government is that unworthy men are elected or appointed to fill important offices.