/ ˈbaɪnəri; NAmE / adjective
( computing , mathematics ) using only 0 and 1 as a system of numbers :
the binary system
( technical ) based on only two numbers; consisting of two parts :
binary code / numbers
► bin·ary noun [ U ]:
The computer performs calculations in binary and converts the results to decimal.
late Middle English (in the sense duality, a pair ): from late Latin binarius , from bini two together.