›to finish, use, or sell all of something, so that there is none left: run out of sthWe are about to run out of paper and toner.The order for more forms should be placed before we run out.
›if a supply of something runs out, all of it has been used or it is completely finished: Oil supplies are low, but they have not run out yet.My patience is beginning to run out.
›if a document or official agreement runs out, the period of time for which it is effective finishes: My passport runs out next month.