Efficient — synonyms, efficient antonyms, definition

1. efficient (a)

able acknowledged active adept adequate alert animated apt busy capable clever competent dependable diligent eager earnest effective effectual efficacious expedient • • •

2. efficient (Adjective)

inefficient

efficient (Adjective) — Being effective without wasting time, effort or expense. ex. "an efficient production manager" ex. "efficient engines save gas"

efficient (Adjective) — Able to accomplish a purpose; functioning effectively. ex. "an efficient secretary" ex. "the efficient cause of the revolution"