Insufficiency In`suf*fi"cien*cy, n. [L. insufficientia: cf. F. insuffisance, whence OE. insuffisance. See {Insufficient}.] [1913 Webster] 1. The quality or state of being insufficient; lack of sufficiency; deficiency; inadequateness; as, the insufficiency of provisions, of an excuse, etc. [1913 Webster]

The insufficiency of the light of nature is, by the light of Scripture, . . . fully supplied. --Hooker. [1913 Webster]

2. Lack of power or skill; inability; incapacity; incompetency; as, the insufficiency of a man for an office. [1913 Webster]

The Collaborative International Dictionary of English. 2000.