Definitions
1.nounA publication, such as a newspaper or magazine, that is issued with a printed date later than the date of issue.
2.verbTo designate a date earlier than the actual one; to move a date, appointment, event, or period of time to an earlier point (contrast "postdate".)
3.verbTo exist or to occur before something else; to antedate."The Chinese use of Pascal's Triangle predates its discovery by Blaise Pascal."