Wiktionary
n. 1 (context computing English) The practice of providing open-source code for a product. 2 (context computing English) Open-source software in general. vb. To make open-source.
Wikipedia
Open source denotes that a product includes permission to use its source code, design documents, or content (see open source and open content – the latter deals with non-software deliverables or where the distinction between source code and other content is unclear or complex).
It may also mean:s
Open Source is an American public radio show hosted by Christopher Lydon, former New York Times journalist and original host of The Connection. The show focuses on the arts, literature, and foreign affairs.
Usage examples of "open source".
She's a late-model Sony, thoroughly upgradeable: Manfred's been working on her in his spare minutes, using an open source development kit to extend her suite of neural networks.
In the world of open source software, bug reports are useful information.
The battle rages between commercial interests and champions of the ethos of free content and open source software.
Should your mission parameters change then you need to ensure that your men are made aware that the basic mission parameters can be considered open source but if there is a mission change it goes totally black.