Definition of Rate

• amount of a charge or payment relative to some basis; "a 10-minute phone call at that rate would cost $5"
• a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected"
• the relative speed of progress or change; "he lived at a fast pace"; "he works at a great rate"; "the pace of events accelerated"