† ˈbitterful,a.Obs. [f. bitter n. + -ful.] Full of bitterness. a1500Lament. Mary Magd. 53 (Chaucer's Wks.) Remembryng this bitterfull departing.1552Huloet, Bytterful, or full of bytternes.1618Sheph.Cal. (1656) xlviii, Pilate condemned him to the most bitterfull death.