Definition of caulk in English:

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Pronunciation: /kɔːk/
(US also calk)


[mass noun]
A waterproof filler and sealant, used in building work and repairs: use silicone caulk to ensure that you have an all-season moisture seal
More example sentences
  • Seal the base of the toilet bowl with plumber's putty or silicone caulk.
  • If small holes are found, you can repair them with caulk or polyethylene or foil tape.
  • Seal joints between the wall and your new tub with silicone caulk as protection against water seepage.


[with object]
1Seal (a gap or seam) with caulk: caulk all cracks between the trim and siding or masonry
More example sentences
  • At Brooker Creek Elementary School, plant operators were caulking the seams left when aluminum awnings over the doors were ripped away from several portable classrooms.
  • The seams were caulked with tow, which I procured from untwisted ropes.
  • You should plug and caulk holes or penetrations for faucets, pipes, electric outlets, and wiring.
1.1Make (a boat) watertight by stopping up any gaps in its hull: a garden must be cleared, boats caulked, and nets mended
More example sentences
  • Within two minutes of ordering appetizers, our party was inundated with marshmallow-size gnocchi and enough gooey risottos to caulk a ship.
  • Eventually, the museum will caulk and paint Surprise to make her seaworthy.
  • The obscure gray water is dotted with fishing boats, which brush the calm surface, each caulked with a paste of alchemical silvers.



Pronunciation: /ˈkɔːkə/
Example sentences
  • We don't care about the experts turning that two-bedroom shanty into a beautiful mansion, we want to see that arrogant caulker shoot a roofing nail into his foot and fall into a tree mulching machine.
  • In 1838, while a ship caulker's apprentice, Douglass acquired free seaman papers and escaped to New York City.
  • Novice calkers will find that this makes these tools a lot easier to hit than the old Drews.


Late Middle English (in the sense 'copulate', used of birds): from Old Northern French cauquer, caukier, variant of cauchier 'tread, press with force', from Latin calcare 'tread', from calx, calc- 'heel'.

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