1 (computing计算机技术) (mathematics数学) using only 0 and 1 as a system of numbers 二进制的（只用0和1两个数目的数字进位制的）: the binary system 二进制binary arithmetic 二进制算术

2 (technical术语) based on only two numbers; consisting of two parts 二进制的；由两部份组成的 binary noun [U]: The computer performs calculations in binary and converts the results to decimal. 计算机以二进制运算，然后把结果转换为十进制。