1.Definition: a lack of competence

"Pointed out the insufficiencies in my report", "Juvenile offenses often reflect an inadequacy in the parents"

Related Noun(s):insufficiency

Category: General

2.Definition: lack of an adequate quantity or number

"The inadequacy of unemployment benefits"

Related Noun(s):deficiency, insufficiency

Category: General

3.Definition: unsatisfactoriness by virtue of being inadequate

Related Noun(s):inadequateness

Category: General