The meaning of DEFICIENT is lacking in some necessary quality or element. How to use deficient in a sentence.

DEFICIENT definition: lacking some element or characteristic; defective. See examples of deficient used in a sentence.

1. lacking some element or characteristic; defective. 2. inadequate. n. 3. one who is deficient, esp. one who is mentally defective.

Not good enough (Definition of deficient from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

If someone or something is deficient in a particular thing, they do not have the full amount of it that they need in order to function normally or work properly.

Definition of deficient adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Deficient definition: Lacking an essential quality or element.

5 days ago · Adjective deficient (comparative more deficient, superlative most deficient) Lacking something essential; often construed with in.

deficient meaning, definition, what is deficient: not containing or having enough of somet...: Learn more.

Deficient means not enough or not adequate. Maybe you were deficient in caffeine that day. Maybe you were lacking in study time. But no doubt about it: you came up with a deficient number of correct …