Wanting, to make up completeness; wanting, as regards a requirement; not sufficient; inadequate; defective; imperfect; incomplete; lacking; as, deficient parts; deficient estate; deficient strength; deficient in judgment. The style was indeed deficient in ease and variety. (Macaulay) deficient number.
(Science: mathematics) see abundant. Defi”cient-ly.
Origin: L. Deficiens, -entis, p. Pr. Of deficere to be wanting. See defect.