lagging Hear it!

lagging definition

lag·ging (lag′iŋ)

noun

  1. thermal insulation for wrapping around pipes, boilers, etc.
  2. a wood framework to support an arch while it is being built
  3. Mining planks or timber used to prevent rocks from falling in a shaft or drift

Etymology: < lag + -ing

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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