deficient Definition

  • 1not having enough of a specified quality or ingredient
  • 2inadequate in amount or degree

Using deficient: Examples

Take a moment to familiarize yourself with how "deficient" can be used in various situations through the following examples!

  • Example

    The soil was deficient in nutrients.

  • Example

    Her diet was deficient in vitamins.

  • Example

    The team's performance was deficient in many areas.

  • Example

    The report was deficient in detail.

  • Example

    The company was found to be deficient in safety measures.

deficient Synonyms and Antonyms

Synonyms for deficient

Antonyms for deficient

Phrases with deficient

  • having a mental disability or impairment


    The school provides special education for mentally deficient children.

  • lacking in a particular quality or ingredient


    The soup was deficient in salt.

  • lacking in essential vitamins


    The doctor prescribed supplements for her vitamin deficient condition.

Origins of deficient

from Latin 'deficiens', present participle of 'deficere', meaning 'to desert, fail'


Summary: deficient in Brief

The term 'deficient' [dɪˈfɪʃənt] refers to something that is lacking in a specified quality or ingredient. It can also mean inadequate in amount or degree. Examples include deficient soil, deficient diet, and deficient performance. Phrases like 'mentally deficient' and 'vitamin deficient' denote specific types of deficiency.