beˈlieffulnessarch. [f.prec. + -ness.] The quality of being full of belief or faith. 1548Udall, etc. Erasm. Par. Luke iv. 24 Y⊇ godly beliefulnesse of the heathen.1853Clough Poems & Pr. Rem. I. 213 And there is a hopefulness and a belieffulness, so to say, on your side.