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  1. Dictionary
    fuel-efficient

    adjective

    • 1. (chiefly of a vehicle) designed to prevent the wasteful consumption of fuel: "an affordable, fuel-efficient compact car"

    More definitions, origin and scrabble points

  2. used to describe engines or machines that do not use much fuel in relation to similar engines or machines: The trend toward more fuel-efficient cars should continue for the rest of the decade. (Definition of fuel-efficient from the Cambridge Business English Dictionary © Cambridge University Press) Examples of fuel-efficient.

  3. Fuel efficiency (or fuel economy) is a form of thermal efficiency, meaning the ratio of effort to result of a process that converts chemical potential energy contained in a carrier into kinetic energy or work.

  4. used to describe engines or machines that do not use much fuel in relation to similar engines or machines: The trend toward more fuel-efficient cars should continue for the rest of the decade. (Definition of fuel-efficient from the Cambridge Business English Dictionary © Cambridge University Press) Examples of fuel-efficient.

  5. the relationship between the amount of fuel a car uses and the distance it travels: Hybrids can give up to 40% better fuel efficiency, depending on how they are driven. a measure of how much energy is produced by an engine in relation to the amount of fuel that it uses:

  6. Fuel-efficient definition: producing power, heat, etc., at a rate considered optimal with regard to the amount of fuel consumed.. See examples of FUEL-EFFICIENT used in a sentence.

  7. Learn the meaning of fuel-efficient, an adjective that describes a vehicle, engine, etc. that uses less fuel than other models. See how to use it in sentences and compare it with related words.

  8. Definition of fuel-efficient adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.