from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Lacking an essential quality or element: deficient in common sense.
- adj. Inadequate in amount or degree; insufficient: a deficient education.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Lacking something essential; often construed with in.
- adj. Insufficient or inadequate in amount.
from the GNU version of the Collaborative International Dictionary of English
- adj. Wanting, to make up completeness; wanting, as regards a requirement; not sufficient; inadequate; defective; imperfect; incomplete; lacking
from The Century Dictionary and Cyclopedia
- Lacking; wanting; incomplete.
- Defective; imperfect; inadequate: as, deficient strength.
- Not having a full or adequate supply: as, the country is deficient in the means of carrying on war.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of a quantity not able to fulfill a need or requirement
- adj. falling short of some prescribed norm
- adj. inadequate in amount or degree
Latin dēficiēns, dēficient-, present participle of dēficere, to fail, be wanting; see defect.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin deficiens, present participle of deficere ("to lack, fail, be wanting"); see defect. (Wiktionary)