binary system

noun

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

Word History and Origins

Origin of binary system¹

First recorded in 1825–35

Example Sentences

Two centuries ago the distinguished philosopher and mathematician, Leibnitz, proposed a binary system of numeration.

From Project Gutenberg

It is not known that they constitute a binary system, because no certain evidence of motion has been obtained.

From Project Gutenberg

The close pair is a binary system with a long period of revolution, estimated at about two hundred years.

From Project Gutenberg

The star 70 Ophiuchi (fig. 3) may be regarded as typical of a binary system.

From Project Gutenberg

It is virtually certain that RR Centauri is a case of an eclipsing binary system, and that the two stars are close together.

From Project Gutenberg