definition of
deficient

[1] #1 deficient s. [lacking, wanting] inadequate in amount or degree; "a deficient education"; "deficient in common sense"; "lacking in stamina"; "tested and found wanting". wn

[2] #2 deficient a. [insufficient] of a quantity not able to fulfill a need or requirement; "insufficient funds". wn

[3] #3 deficient s. [inferior, substandard] falling short of some prescribed norm; "substandard housing". wn