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English definition of “energy-efficient”

energy-efficient

adjective uk   /ˈen.ə.dʒi.ɪˌfɪʃ.ənt/ us    /-ɚ-/
using little electricity, gas, etc.: energy-efficient homes/energy-efficient lightingEnvironmental issuesRubbish and wasteProtection and protectors
(Definition of energy-efficient from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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