adequate for the purpose; enough: sufficient proof; sufficient protection.
Logic. (of a condition) such that its existence leads to the occurrence of a given event or the existence of a given thing. Compare necessary (def 4c).
Archaic. competent.
Origin: 1350–1400; Middle English < Latin sufficient- (stem of sufficiēns), present participle of sufficere to suffice, equivalent to suf- suf- + -fici-, present stem of -ficere, combining form of facere to make, do1 + -ent- -ent