The term 'rate of movement' can be defined as the SPEED, TEMPO, or PACE at which something moves. SPEED is the rate of movement over a given period of time, and is typically measured in units such as miles per hour or kilometers per hour. TEMPO is the rate of SPEED at which a piece of music is played, and is usually measured in beats per minute. PACE is the rate of SPEED at which someone walks or runs, and is usually measured in minutes per mile.