(1):

(a.) Self-sufficient; self-satisfied; content.

(2):

(a.) Possessing adequate talents or accomplishments; of competent power or ability; qualified; fit.

(3):

(a.) Capable of meeting obligations; responsible.

(4):

(a.) Equal to the end proposed; adequate to wants; enough; ample; competent; as, provision sufficient for the family; an army sufficient to defend the country.