Word

efficiency

noun C1

/ɪˈfɪʃ.ən.si/

Meanings

noun

the ability to do something well without wasting time, effort, or resources

noun

how effectively a machine, process, or system converts input (such as energy or materials) into useful output with minimal loss

efficiency: how effectively a machine, process, or system converts input (such as energy or materials) into useful output wi…

Definition

Efficiency is the ability to achieve a result with the least possible waste of time, effort, or resources.

Efficiency describes how well something is done with minimal waste. It often refers to using time, energy, money, or materials in the best possible way. In work and systems, higher efficiency means getting the same output with fewer inputs, or more output with the same inputs.

Examples

The new scheduling software improved efficiency across the entire team without increasing workload.
I value efficiency when I travel, so I plan connections that minimize waiting time.
She questioned the efficiency of the old heating system after noticing how quickly the house cooled down.
They tracked efficiency on the production line by comparing output to the materials used each shift.

Common mistake

Learners often confuse efficiency with effectiveness: efficiency is about minimizing waste, while effectiveness is about achieving the intended goal.