deficient

adjective

de·fi·cient | \ di-ˈfi-shənt

Definition of deficient

(Entry 1 of 2)

1 : lacking in some necessary quality or element deficient in judgment bones deficient in calcium

2 : not up to a normal standard or complement (see complement entry 1 sense 1b(1)) : defective deficient strength … rusted and aging pipes … abetted by deficient maintenance and sabotage.— Adam Nossiter

deficient

noun

Definition of deficient (Entry 2 of 2)

: a person or thing that is deficient a mental deficient

Other Words from deficient Synonyms & Antonyms More Example Sentences Learn More about deficient

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Synonyms & Antonyms for deficient

Synonyms: Adjective

fragmental, fragmentary, half, halfway, incomplete, partial

Antonyms: Adjective

complete, entire, full, intact, integral, perfect, whole

Examples of deficient in a Sentence

Adjective

Several bridges in the city are structurally deficient. a diet deficient in calcium can lead to weak bones

Recent Examples on the Web: Adjective

Promoted as a state-of-the art transportation hub to replace a former terminal that had been deemed seismically deficient, the center connects many of the San Francisco Bay Area’s transit systems in a structure that stretches four city blocks. — Alejandro Lazo, WSJ, "San Francisco’s New Transit Center Closes After Cracked Steel Beam Found," 25 Sep. 2018 Supplements from the Supermarket Vitamin D: This vitamin is imperative to keeping your immune system strong, and most of us are vitamin D deficient. — Aarti Sanan, Redbook, "Wedding Dress Challenge: Clean, Green, Juicing Machine," 20 Apr. 2012 The viaduct is considered functionally obsolete and structurally deficient. — David Porter, Fox News, "NYC commuters are spared a nightmare as road project starts," 21 Aug. 2018 Amazon has upgraded the sound quality on all of its new Echo devices coming out this year, but the improvements are most noticeable on the Dot simply because of how deficient the prior model was. — Dan Seifert, The Verge, "Amazon Echo Dot (3rd gen) review: better looks, better sound, same price," 12 Oct. 2018 The viaduct is considered functionally obsolete and structurally deficient. — David Porter, Fox News, "NYC commuters are spared a nightmare as road project starts," 21 Aug. 2018 The viaduct is considered functionally obsolete and structurally deficient. — David Porter, The Seattle Times, "NYC commuters are spared a nightmare as road project starts," 20 Aug. 2018 Bridges can be both functionally obsolete and structurally deficient. — Erik Sofge, Popular Mechanics, "Just How Fragile Are America's Bridges?," 28 May 2013 The dangers of losing oxygen, explained The US Occupational Safety and Health Administration considers environments with less than a 19.5 percent oxygen by volume to be oxygen-deficient, and a health hazard. — Brian Resnick, Vox, "Why the trapped Thai soccer team is in increasing trouble: they’re running out of oxygen," 6 July 2018

Recent Examples on the Web: Noun

But rising home prices are bailing out large numbers of the equity deficient: their number is down by more than 1.2 million in the last 12 months. — Kenneth R. Harney, miamiherald, "Which U.S. neighborhood has homeowners with the most equity? Answer may surprise you," 22 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deficient.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

History and Etymology for deficient

Adjective

borrowed from Latin dēficient-, dēficiens, present participle of dēficere "to leave without enough, let down, be lacking, run short, fail," from dē- de- + facere "to make, bring about, perform, do" — more at fact

Noun

derivative of deficient entry 1

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