Definition of "insufficient"

insufficient

/ɪnsəˈfɪʃənt/

determiner
1. An inadequate quantity of; not enough.
2. (as pronoun) A quantity (of something) that is less than is needed.
adjective
comparative more insufficient, superlative most insufficient
1. Not sufficient; of a type or kind that does not suffice, that does not satisfy requirements or needs.
2. Not sufficient; lacking competent power or ability; unqualified, unequal, unfit.
  Quotations
  Brother Coſroe, I find my ſelfe agreeu’d,Yet inſufficient to expreſſe the ſame:For it requires a great and thundering ſpeech: […]
  c. 1587–1588, [Christopher Marlowe], Tamburlaine the Great. […] The First Part […], 2nd edition, part 1, London: […] [R. Robinson for] Richard Iones, […], published 1592; reprinted as Tamburlaine the Great (A Scolar Press Facsimile), Menston, Yorkshire, London: Scolar Press, 1973, (please specify the page)