A continuum which lacks spatial dimensions and in which events succeed one another from past through present to future is one definition of time. It is considered the measured or measurable period during which an action, process or condition exists or continues. As a genealogist, we often deal with measurable periods of time during which our ancestors existed. Mostly, it is time spent going from present to past. Here is a picture of my grandson and I sharing some time in one of those passageways which leads to other places.
Hand in hand, moving on down this hallway...we walked, and talked...and shared. Past, to present, and hopefully to the future...this corridor in time.