insufficienta.[L. insufficiens, -entis. See In- not, and Sufficient.]()1. Not sufficient; not enough; inadequate to any need, use, or purpose; as, the provisions are insufficient in quantity, and defective in quality.(Cowper.)2. Wanting in strength, power, ability, capacity, or skill; incompetent; incapable; unfit; as, a person insufficient to discharge the duties of an office.()()