C1noun2K

Efficiency

UK /["/ɪˈfɪʃnsi/"]/US /["/ɪˈfɪʃnsi/"]/

Definition

the quality of doing something well with no waste of time or money

In simple words: How well a task is done with the least waste of time and resources.

Examples

  • The efficiency of the new engine significantly reduces fuel consumption.
  • Improving workplace efficiency leads to higher productivity and lower costs.
  • Efficiency in energy use is a critical factor in sustainable building design.
  • They hired a consultant to analyze the efficiency of their supply chain.
  • Efficiency is often measured by the ratio of output to input in a process.

Usage notes

Use 'efficiency' in both formal and informal contexts when discussing productivity. Avoid using it in casual conversations that don't concern work or processes.

Grammar pattern

standalone noun

Memory hint

Think of 'efficiently' — doing tasks quickly with no waste, like a well-oiled machine.

Collocations

  • ruthless
  • great
  • high
  • achieve
  • maintain
  • demonstrate
  • drive
  • measures
  • benefits
  • with efficiency
  • efficiency in
  • ruthless
  • great
  • high
  • achieve
  • maintain
  • demonstrate
  • drive
  • measures
  • benefits
  • with efficiency
  • efficiency in

Synonyms

  • productivity
  • effectiveness
  • performance
  • competence
  • capability

Antonyms

  • inefficiency
  • wastefulness
  • unproductiveness

Common mistakes

  • Confused with 'efficacy', which refers to the ability to produce a desired result.
  • Using 'efficient' instead of 'efficiency' incorrectly in phrases.
  • Overusing in casual conversation where simpler terms like 'speed' might suffice.