In English, efficiency means the quality of being able to do something well without wasting time, money, energy, or materials. It is a noun that describes the ability to achieve maximum productivity with minimum wasted effort. According to dictionaries, efficiency is defined as the ratio of useful output to total input, or the state of working in a well-organized and competent way. For example, if a machine has high efficiency, it converts most of its energy input into useful work and loses little as heat. If a person works with efficiency, they complete tasks quickly, correctly, and with good planning. Efficiency is related to words like productivity, effectiveness, and economy, but it specifically emphasizes minimizing waste. In everyday English, you might say the new heating system improved efficiency, meaning it heats the house using less fuel, or she works with great efficiency, meaning she gets a lot done without wasting time. The adjective form is efficient and the adverb is efficiently. Efficiency is considered a positive attribute in English, implying smart, economical, and competent performance in any field from engineering to business to daily life.
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