Binary (album) definition

(1) Consisting of two (units or components or elements or terms) or based on two

"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"

(2) Of or pertaining to a number system have 2 as its base

"A binary digit"

(3) A system of two stars that revolve around each other under their mutual gravitation