source Definition in the Cambridge English Dictionary
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Definition of “source” - English Dictionary

Definition of "source" - American English Dictionary

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sourcenoun [C]

 us   /sɔrs, soʊrs/
something or someone that ​causes or ​produces something, or is the ​origin of it: a source of ​energy/​light Spinach is a good source of ​vitamins. His ​wife was a ​constant source of ​inspiration to him. A source is also someone or something from which you ​obtaininformation: The ​reporterrefused to ​cite the ​names of her sources.

sourceverb [T]

 /sɔrs, soʊrs/
to get something from a ​particularplace: Where ​possible the ​produce used in ​ourrestaurant is sourced ​locally.
(Definition of source from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "source" - British English Dictionary

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sourcenoun [C]

uk   /sɔːs/  us   /sɔːrs/
B2 the ​place something comes from or ​starts at, or the ​cause of something: a source ofheat/​energy/​light a ​heat/​energy/​light source Oranges are a good source ofvitamin C. Experts are ​trying to ​track down the source of the ​contamination in the ​watersupply. We ​walked up the ​river to ​its source in the ​hills. Money is often a source of ​tension and ​disagreements in ​youngmarriedcouples.C1 someone or something that ​suppliesinformation: The ​journalistrefused 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. According to ​congressional sources (= ​people who ​work in ​Congress) many Representatives are ​worried about this ​issue. Always ​acknowledgeyour sources (= say which ​books you have used) at the end of a ​paper.at source at the ​place where something comes from: Tax is ​deducted from my ​income at source.
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sourceverb [T often passive]

uk   /sɔːs/  us   /sɔːrs/
to get something from a ​particularplace: Where ​possible the ​produce used in ​ourrestaurant is sourced ​locally.
(Definition of source from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "source" - Business English Dictionary

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sourcenoun [C]

uk   us   /sɔːs/
the ​place or thing that something comes from or ​starts at, or the cause of something: source of sth Customer ​complaints are a very important source of ​information.source of income/revenue For many ​poor families, ​pensions are now the ​main source of ​income. The ​project still may ​work if ​money can be ​found from other sources to ​supplementtolls. The source of the problem is unrealistic ​expectations about what ​training can accomplish.
[often plural] someone or something that ​suppliesinformation: Industry sources said discussions were taking ​place. A source ​close to the ​firm said a ​total of eight ​employees would be ​let go.
at source TAX if your ​income is ​taxed at source, ​incometax is taken from your ​salary and ​sent directly to the ​taxauthorities: Tax is ​deducted from my ​income at source.

sourceverb [T, often passive]

uk   us   /sɔːs/ PRODUCTION
to get something, especially ​products or ​materials, from a particular ​place: source sth from sth The ​supermarket decided it wanted to source all its ​milk from one ​company. More and more of its ​merchandise will have to be sourced ​overseas. Financial ​information can now be sourced from an ​endlessstream of ​onlineservices.
(Definition of source from the Cambridge Business English Dictionary © Cambridge University Press)
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