# binary system

- a system involving only two elements, as 0 and 1 or yes and no.
- Mathematics. a system of counting or measurement whose units are powers of two.Compare binary(def 2a).
- Astronomy. binary star.

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## Origin of binary system^{}

First recorded in 1825–35

Also called dyadic system (for defs 1, 2).

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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018