Contemplating the meaning of time

inspired by Thief of Time - Terry Pratchett

Basically, the question is, what is time? To answer, this question, we have to ask what purpose time serves.
Sounds simple doesnt it? any quick answers? didnt think so. so often its the really simple questions that stump everyone.
Maybe, it would help if we imagined a situation where there was no time. What would that be like?
Lets just presume that everything would happen all at once, and we'd have a grand big mess.
That would mean time keeps separate events separate. for example, without time, consumption, digestion and excretion would occur all at once. now that, is gross.
With that out of the way, then how do you measure time? in seconds? in nanoseconds? what is the smallest division of time? how far can time be divided? yeah it sounds like matter and atoms.(superstrings now actually)
since time is needed to keep events separate, the smallest unit of time, is the time needed for this particular event to occur.

thats about it so far.