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English definition of “supplement”

supplement

verb [T]     /ˈsʌplɪment/
to add more people or things to an activity or process in order to improve it: During especially busy periods, around 175 temporary workers supplement a production workforce of 3,500. Legal controls have been supplemented by financial controls, especially over capital expenditure.
HR, WORKPLACE to earn or receive extra money in addition to your basic salary or pension: Base pay of all executives is £125,000, supplemented by bonuses linked to individual output.supplement your income/earnings/pension They decided to use the equity in their home to supplement their income.
(Definition of supplement verb from the Cambridge Business English Dictionary © Cambridge University Press)
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