noun “efficiency”
singular efficiency, plural efficiencies or uncountable
- the ability to do tasks well without wasting time or energy
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The manager praised her efficiency in completing the tasks ahead of schedule.
- (in engineering) a measure of how much useful work is done compared to the energy used
The efficiency of the solar panels has greatly improved.
- (US) a small one-room apartment with a bathroom and kitchenette
He rented an efficiency in the city center.