- the state or quality of being efficient, or able to accomplish something with the least waste of time and effort; competency in performance.
- accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort: The assembly line increased industry's efficiency.
- the ratio of the work done or energy developed by a machine, engine, etc., to the energy supplied to it, usually expressed as a percentage.
- efficiency apartment.
- the quality or state of being efficient; competence; effectiveness
- the ratio of the useful work done by a machine, engine, device, etc, to the energy supplied to it, often expressed as a percentage
