Efficient - Definition

adj 1: being effective without wasting time or effort or
expense; "an efficient production manager"; "efficient
engines save gas" [ant: inefficient]
2: 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" [syn:
effective, efficient]