An abstract concept used to describe the linear passaage of events obsesrvable in three dimensions. The "classical" three dimensions (length, width, height) are spatial
, whereas time is temporal
. Time cannot be directly observed, only quantified in terms of seconds, minutes, hours, etc. Time itself is impossible to accurately illustrate in our 3-D
world, but is most often represented as a line, moving in one direction at a constant rate.