1
a
of software : having the source code freely available for possible modification and redistribution
an open-source operating system
b
: of, relating to, or promoting open-source software
the open-source movement/community
Instead, they opted for the open-source model, in which computer code is openly shared, allowing programmers to modify, improve and fix the software.Steve Lohr
2
a
: publicly available for use by the community at large
open-source images
The team uses open-source materials such as obituaries in local newspapers and cemetery visits for its count.Brendan Hoffman
b
: relating to or utilizing information that is publicly available
an open-source analysis
Since the advent of the internet, social media and smartphones, open-source intelligence has undergone a revolution as people willingly and publicly post vast amounts of information online. Actors outside of the traditional intelligence community have begun to take notice.Nick Waters

Examples of open-source in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
An in-depth report on how Tanzanian police crushed election protests with lethal force by BBC Verify, a specialist team of journalists using methods such as open-source intelligence, satellite imagery, and data analysis. Yinka Adegoke, semafor.com, 15 Dec. 2025 Designs with additional tiers show up to a twelve-fold improvement on real AI workloads, including those derived from Meta’s open-source LLaMA model, as per the release. Prabhat Ranjan Mishra, Interesting Engineering, 14 Dec. 2025 And the country should deepen its collaboration among government, industry, and research institutions to reclaim open-source leadership. Eric Schmidt, Time, 11 Dec. 2025 The company’s obsession with its open-source large language model has given way to a very different approach to AI, one focused around a multibillion-dollar hiring spree to bring in top industry talent that could help Meta take on the likes of OpenAI, Google and Anthropic. Jonathan Vanian, CNBC, 9 Dec. 2025 See All Example Sentences for open-source

Word History

First Known Use

1956, in the meaning defined at sense 2

Time Traveler
The first known use of open-source was in 1956

Cite this Entry

“Open-source.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/open-source. Accessed 16 Dec. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!