an interval of time between one event, process or period, and another.occurring in an interval of time between one event, process or period and another.describes something that is intended to be temporary until something more permanent is established.occurring in an interval of time between one event, process or period and another. Now, right now you're riding the hobbyhorse of the interim read, the prior and interim read. -E-MeterData Instant Reads, Part 11 (24 May 62)the period of time in between; meantime.