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
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.
Gravitational waves are the only way scientists can observe a collision in a binary system in which two black holes orbit each other. Jacopo Prisco, CNN Money, 16 July 2025 These are binary systems in which one object, a dense stellar corpse known as a white dwarf, is stripping material from a companion star. Robert Lea, Space.com, 3 July 2025 During this stage, mass loss from the donor star causes the orbital period of the binary system to increase, with the white dwarf and companion star moving away from each other. Robert Lea, Space.com, 3 July 2025 Novas occur when two stars revolving around each other, called a binary system, create a thermonuclear explosion. Elizabeth Gamillo, Smithsonian Magazine, 3 July 2025 See All Example Sentences for binary system

Word History

First Known Use

1802, in the meaning defined above

Time Traveler
The first known use of binary system was in 1802

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Cite this Entry

“Binary system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/binary%20system. Accessed 29 Jul. 2025.

Kids Definition

binary system

noun
: a system of two objects that revolve around each other
especially : binary star

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