I don't wish to start another philisophical discussion about timespace or relativity. I have searched the forum but can someone quickly tell me what the definition of 'Time' is. Please use fundamental terms only. Do not use duration or period as this is as if a synomyn. Here is Encarta's definition: "A period in which an action/event takes to occur. Time can be affected through motion (SR) or space (GR)." But notice the use of the term period. So can someone help?