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lacking some element or characteristic; defective:
deficient in taste.
insufficient; inadequate:
deficient knowledge.
a person who is deficient, especially one who is mentally defective.
lacking some essential; incomplete; defective
inadequate in quantity or supply; insufficient

deficient de·fi·cient (dĭ-fĭsh’ənt)

Lacking an essential quality or element.

Inadequate in amount or degree; insufficient.


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  • Undefinable

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