1 : able to accomplish a purpose; functioning effectively; "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw; "effective personnel"; "an efficient secretary"; "the efficient cause of the revolution"
adjectif
1 : being effective without wasting time or effort or expense
2 : marked by qualities giving the power to produce an intended effect
3 : producing or capable of producing an intended result or having a striking effect
