Definition of open-source in US English:

open-source

adjective

Computing
  • Denoting software for which the original source code is made freely available and may be redistributed and modified.

    • ‘When you enhance open-source software, you have to provide others with the source so they can build on it further.’
    • ‘We accomplished this feat by using only commodity hardware and open-source software.’
    • ‘Some open-source software comes with poor documentation, just like some proprietary software.’
    • ‘If you measure the success of a code base by features, however, open-source software is the winner.’
    • ‘However, the open-source software browser's security story has had to deal with some hiccups.’

Pronunciation

open-source