As a Noun: 1. A defined or particular length of time. English = period. 2. The greatest amount, extent, or degree of something that is possible or allowed. English = limit. Interactive: 1. Used alone in response to what someone has said or at the end of something you have said to mean there is nothing more to say about a particular topic. English = ‘That’s it’ ‘No more, no less’, ‘Period’. As Modifier: 1. Used immediately next to two signs specifying points in time (times, days, months, years, dates) to mean between these two times. English = from X, to Y; between X and Y.