Needful \Need"ful\ (n[=e]d"f[.u]l), a. 1. Full of need; in need or want; needy; distressing. [Archaic] --Chaucer. [1913 Webster] The needful time of trouble. --Bk. of Com. Prayer. [1913 Webster] 2. Necessary for supply or relief; requisite. [1913 Webster] All things needful for defense abound. --Dryden. [1913 Webster] -- {Need"ful*ly}, adv. -- {Need"ful*ness}, n. [1913 Webster]