In`suf*fi"cien*cy (?), n. [L. insufficientia: cf. F. insuffisance, whence OE. insuffisance. See Insufficient.]

1. The quality or state of being insufficient; want of sufficiency; deficiency; inadequateness; as, the insufficiency of provisions, of an excuse, etc.

The insufficiency of the light of nature is, by the light of Scripture, . . . fully supplied.

2. Want of power or skill; inability; incapacity; incompetency; as, the insufficiency of a man for an office.