open-source Meaning in the Cambridge English Dictionary
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Meaning of “open-source” in the English Dictionary

"open-source" in British English

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open-sourceadjective

uk   /ˌəʊ.pənˈsɔːs/  us   /ˌoʊ.pənˈsɔːrs/ specialized
Open-source ​software is ​free to use, and the ​originalprogram can be ​changed by anyone.
(Definition of open-source from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"open-source" in Business English

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open-sourceadjective

uk   us   /ˌəʊpənˈsɔːs/ IT
used to refer to ​software, etc. that is ​free to use and can be ​studied or ​improved by anyone because it is ​based on a code that anyone can use: open-source ​operatingsystems/​software
(Definition of open-source from the Cambridge Business English Dictionary © Cambridge University Press)
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