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Definitions

deficiency

[dih-fish-uhn-see] / dɪˈfɪʃ ən si /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He attempts to disguise this deficiency with endless boasting about himself and endless denigration of others.

From Salon • Mar. 28, 2026

A 2009 study involving 200 men with bladder cancer found that those with color vision deficiency were often diagnosed at more advanced and invasive stages than those with typical vision.

From Science Daily • Mar. 10, 2026

On Tuesday the FDA said it was in fact approving use of leucovorin for a rare condition called cerebral folate deficiency but not for autism.

From Barron's • Mar. 10, 2026

FDA Commissioner Marty Makary said the approval could help those with cerebral folate transport deficiency “who have developmental delays with autistic features.”

From The Wall Street Journal • Mar. 10, 2026

As with so many other things, time is the key factor—speed in discovering the deficiency, and speed in administering hormonal substitutes.

From "Flowers for Algernon" by Daniel Keyes