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English definition of “source”

source

noun [C] uk   /sɔːs/ us    /sɔːrs/
B2 the place something comes from or starts at, or the cause of something: a source of heat/energy/light a heat/energy/light source Oranges are a good source of vitamin C. Experts are trying to track down the source of the contamination in the water supply. We walked up the river to its source in the hills. Money is often a source of tension and disagreements in young married couples. C1 someone or something that supplies information: The journalist refused to reveal her sources (= say who had given the information to her). According to government sources (= people in the government) many MPs are worried about this issue. Always acknowledge your sources (= say which books you have used) at the end of an essay. at source at the place where something comes from: Tax is deducted from my income at source.

source

verb [T often passive] uk   /sɔːs/ us    /sɔːrs/
to get something from a particular place: Where possible the produce used in our restaurant is sourced locally.
(Definition of source from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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