Definition of 'deficiency'
- the state of needing something that is absent or unavailable; "there is a serious lack of insight into the problem"; "water is the critical deficiency in desert regions"; "for want of a nail the shoe was lost"
Synonyms: lack want
- lack of an adequate quantity or number; "the inadequacy of unemployment benefits"
Synonyms: insufficiency inadequacy
Antonyms: sufficiency adequacy sufficiency adequacy