Share this entry
caulk Syllabification: caulk
(also calk)

Definition of caulk in English:


(also caulking)
A waterproof filler and sealant, used in building work and repairs.
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] Back to top  
1Seal (a gap or seam) with a waterproof filler and sealant.
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.
1.1Stop up (the seams of a boat) with oakum and waterproofing material, or by driving plate-junctions together; make (a boat) watertight by this method.
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: /ˈkôkər/
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'.

Definition of caulk in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources