efficiencynoun [U]uk us /ɪˈfɪʃ.ən.si/
- She got through her work with speed and efficiency.
- Streamlining cars increases their fuel efficiency.
- Ships from eight navies will be taking part in an exercise in the Pacific to improve their efficiency in combat.
- He's a stickler for efficiency.
- Sweden has shown the way forward on energy efficiency.