a period of time leading up to an important event; the preparation for this
Example:
- an increase in spending in the run-up to Christmas
- during the run-up to the election
- The shops are fully stocked for the Christmas run-up.
the act of running or the distance you run, to gain speed before you jump a long distance, throw a ball, etc.
Example:
- The bowler started his run-up.
- She takes a longer run-up than most high-jumpers.