binary

(noun) a system of two stars that revolve around each other under their mutual gravitation. Synonyms: binary star, double star.

(noun) a pre-compiled, pre-linked program that is ready to run under a given operating system; a binary for one operating system will not run on a different operating system. Synonyms: binary program. Example: "The same source code can be compiled to produce different binaries for different operating systems."

(adj) of or pertaining to a number system have 2 as its base. Example: "A binary digit."

(adj) consisting of two (units or components or elements or terms). Examples: "A binary star is a system in which two stars revolve around each other." "A binary compound." "The binary number system has two as its base."