English dictionary

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English adjective: deficient

1. deficient inadequate in amount or degree

SamplesA deficient education.
Deficient in common sense.
Lacking in stamina.
Tested and found wanting.

Synonymslacking, wanting

Similarinadequate, unequal

Antonymsadequate, equal

2. deficient of a quantity not able to fulfill a need or requirement

SamplesInsufficient funds.


Similardepleted, inadequate, lean, light, low, poor, scant, short, short, shy, skimpy

See alsomeager, meagerly, meagre, scrimpy, stingy



3. deficient falling short of some prescribed norm

SamplesSubstandard housing.

Synonymsinferior, substandard



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