Meaning of insufficient

in•suf•fi•cient

Pronunciation: (in"su-fish'unt), [key]
— adj.
  1. not sufficient; lacking in what is necessary or required: an insufficient answer.
  2. deficient in force, quality, or amount; inadequate: insufficient protection.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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