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binary system
noun
: binary star
also
: a similar system containing bodies (such as black holes) other than stars
Examples of binary system in a Sentence
Recent Examples on the Web
The model accurately predicted the binary system’s orbit today, lending further confidence in its reliability.
—Margherita Bassi, Smithsonian Magazine, 9 Jan. 2025
The research team is already planning additional studies to uncover more of Pluto’s mysteries and learn more about binary systems.
—Monica Cull, Discover Magazine, 6 Jan. 2025
This outburst ejects powerful jets, seen as filaments shooting out from the binary system, forming loops and trails as the plasma emerges in streamers.
—Alan Taylor, The Atlantic, 23 Dec. 2024
The nature of the G objects and the evolution of binary systems in extreme gravitational fields remain ongoing questions, but discoveries like D9 bring astronomers closer to understanding how stars can exist—and thrive—near the heart of our galaxy.
—Dan Perry, Newsweek, 18 Dec. 2024
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Word History
First Known Use
1802, in the meaning defined above
Dictionary Entries Near binary system
Cite this Entry
“Binary system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/binary%20system. Accessed 15 Jan. 2025.
Kids Definition
binary system
noun
: a system of two objects that revolve around each other
especially
: binary star
More from Merriam-Webster on binary system
Britannica.com: Encyclopedia article about binary system
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