slippage

slip +‎ -age

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slippage (countable and uncountable, plural slippages)

1. The act of slipping, especially from a secure location.
2. The amount by which something has slipped.
3. A lessening of performance or achievement.

   Supply-chain problems led to a slippage in production last week.

4. A decrease in motion, or in the power of a mechanical system due to slipping.
5. The difference between estimated and actual transaction costs.
6. Movement of earth on a slope, a landslip.
   • 2021 February 24, “Landslips close lines near Tonbridge”, in RAIL, number 925, page 22:

     The slippage at High Brooms was detected by remote sensors on the site, after two previous incidents in the same area.