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English definition of “be running on empty”

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be running on empty

informal
to continue to work and be active when you have no energy left: I get the impression he's been running on empty for months now. A holiday will do him good. mainly US and Australian English If a person or an organization is running on empty, they have no new ideas or are not as effective as they were before: The fund-raising campaign was running on empty after ten years under the same leader.
(Definition of be running on empty from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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