efficient means: Producing and acting effectively using minimal waste, cost, or effort. (in Merlin Dictionary)

What else does efficient mean?

  • Directly causing an effect by acting. (in Merlin Dictionary)
  • It is less wasteful than similar devices and methods, or requires less effort. Combination. (in Merlin Dictionary)
  • Highly dedicated, hardworking, working to the highest standards and seeking the best solution. Also known as Miriam. (in Slang Dictionary, added by Alani Hoffman)