Definition of derate
: to lower the rated capability of (something, such as an electrical or mechanical apparatus) because of deterioration or inadequacy
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Recent Examples of derate from the Web
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The wheels are then derated to – that is, run at – 50 percent of maximum speed.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'derate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of derate
1947
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