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Meaning of caulk

caulk

Pronunciation: (kôk), [key]
— v.t.
  1. to fill or close seams or crevices of (a tank, window, etc.) in order to make watertight, airtight, etc.
  2. to make (a vessel) watertight by filling the seams between the planks with oakum or other material driven snug.
  3. to fill or close (a seam, joint, etc.), as in a boat.
  4. to drive the edges of (plating) together to prevent leakage.
—n.
  1. a material or substance used for caulking.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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