The meaning of INSUFFICIENT is not sufficient : inadequate; especially : lacking adequate power, capacity, or competence. How to use insufficient in a sentence.

(Definition of insufficient from the Cambridge Academic Content Dictionary © Cambridge University Press)

Dec 14, 2025 · insufficient (comparative more insufficient, superlative most insufficient) Not sufficient; of a type or kind that does not suffice, that does not satisfy requirements or needs. …

INSUFFICIENT definition: not sufficient; lacking in what is necessary or required. See examples of insufficient used in a sentence.

Definition of insufficient adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Something that is insufficient is not large enough in amount or degree for a particular purpose.

Anything that falls short of a required amount or expected measure is insufficient, whether it's the amount of air in a bike tire or the votes needed to win an election.

Late Latin insufficient- (stem of insufficiēns). See in - 3, sufficient Middle English 1350–1400 in′suf•fi′cient•ly, adv. 1. inadequate, scanty, deficient.

1. not sufficient: an insufficient answer. 2. inadequate: insufficient protection.

INSUFFICIENT meaning: not having or providing enough of what is needed not sufficient often followed by to + verb often + for