upstream Meaning in the Cambridge English Dictionary
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Meaning of “upstream” in the English Dictionary

"upstream" in British English

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upstreamadverb, adjective [before noun]

uk   us   /ˌʌpˈstriːm/
(​moving) on a ​river or ​stream towards ​itsorigin: Salmon ​swim upstream against very ​strongcurrents to ​reachtheirbreedingareas. relating to an ​earlierstage in a ​process or ​series of ​events: The company's upstream businessincludesoilexploration and ​production.
Opposite
(Definition of upstream from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"upstream" in American English

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upstreamadjective, adverb [not gradable]

 us   /ˌʌpˈstrim/
against the ​current toward the ​startingpoint of a ​river: Rowing upstream was hard going.
(Definition of upstream from the Cambridge Academic Content Dictionary © Cambridge University Press)

"upstream" in Business English

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upstreamadjective [before noun]

uk   us   /ˌʌpˈstriːm/
relating to something that ​happens earlier in a ​process or ​series of ​events: The company's upstream ​businessincludesoilexploration and ​production.
upstream
adverb
They are ​working upstream to ​try and prevent such a ​situationhappening again.
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(Definition of upstream from the Cambridge Business English Dictionary © Cambridge University Press)
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