[] () the speed of a computer's central processing unit (= the part that controls all the other parts of the computer), which is used as a measure of how fast the computer operates时钟频率（计算机中央处理器的运行速度）◆The new chip has a clock speed of 2.2 gigahertz.新芯片的时钟频率为 2.2 千兆赫。