slip ‧ page /ˈslɪpɪdʒ/ BrE AmE noun [uncountable and countable] formal
[ Word Family: noun : ↑ slip , ↑ slipper , ↑ slippage , ↑ slipperiness ; verb : ↑ slip ; adjective : ↑ slippery ]
1 . failure to do something at the planned time, at the planned cost etc:
Slippage on any job will entail slippage on the overall project.
2 . when something becomes worse or lower
slippage in/of
slippage in sales
3 . when something slips:
snow slippage