› a reduction in the level or amount of something: Every slippage on the stock exchange brought fear and wild accusations.a slippage in sth Exports will offset the slippage in domestic demand. There has been a greater slippage in labour standards in the North than in the South.
› a failure to happen or finish on time: News of the delay in production was not surprising, and observers expect further slippage. the slippage of the book's publication date timetable/schedule slippage
› FINANCE the difference between an expected result and the real result: A slippage of about £3 billion will be announced by the Treasury this week.margin/revenue slippage The $2 million is not enough to make up for the expected revenue slippage.