timestamp
noun(time stamp)
a stamping device used for recording the date and time of day on a document, envelope, etc. (as to indicate when it was received or sent out)
timestamp
noun(time stamp)
an indication of the date and time stamped on a document, envelope, etc.
timestamp
noun(time stamp)
an indication of the date and time recorded as part of a digital signal or file (such as an e-mail, digital photograph, radio broadcast, or text message) indicating the time of creation, transmission, etc.