\ ˈkȯk How to pronounce caulk (audio) \
variants: or
caulked or calked; caulking or calking; caulks or calks

Definition of caulk

 (Entry 1 of 3)

transitive verb

: to stop up and make tight against leakage (something, such as a boat or its seams, the cracks in a window frame, or the joints of a pipe)


noun (1)
variants: or calk or less commonly caulking or calking \ ˈkȯ-​kiŋ How to pronounce calking (audio) \

Definition of caulk (Entry 2 of 3)

: material used to caulk


noun (2)

variant spelling of , calk entry 3

: a cleat on the shoe of a horse to prevent slipping also : a similar device worn on the sole of a shoe

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Other Words from caulk


caulker noun

Examples of caulk in a Sentence

Verb He carefully caulked the area around the windows.
Recent Examples on the Web: Verb Also make sure that your basement is properly sealed and caulked., "Ask Angie’s List: How can I keep warm without using my heater?," 30 Oct. 2019 The seams of the body were caulked with tar to prevent leaks while crossing streams. Mary Ann Ashcraft,, "Carroll Yesteryears: Conestoga wagon an appropriate image for Carroll County seal," 11 Oct. 2019 Weather Stripping After caulking around the outside of the window, move inside and use weather stripping to seal around the sash. Joseph Truini, Popular Mechanics, "How to Winterize Drafty Windows," 13 Sep. 2019 For example, researchers found using a reusable shopping bag is more associated with women’s gender roles, whereas caulking windows is more associated with men’s gender roles. NBC News, "Does this reusable bag make me look gay? Perhaps, study finds," 2 Sep. 2019 Place ant bait stations around the perimeter of your home, and block pest entryways by caulking cracks and crevices. Joan Morris, The Mercury News, "Gardening in the Bay Area: August to-do list," 22 Aug. 2019 Any joint or edge where the tile meets another surface like the countertop should be caulked, not grouted. Joseph Truini, Popular Mechanics, "Your Quick and Dirty Guide to Tiling a Kitchen Backsplash," 26 Apr. 2019 For electrical outlets, caulk around the box, or, even better, buy cover plates with gaskets. Henry Gifford, Popular Mechanics, "Your House Is Bleeding You Dry. Here Are 9 Steps To Save You Money.," 8 Aug. 2018 Sweet-smelling resin, which could have been used for incense or for caulking ships, was also found. James Rogers, Fox News, "Shipwreck mystery solved thanks to 800-year-old 'Made in China' label," 16 May 2018 Recent Examples on the Web: Noun Run a line of caulk along the space, then immediately use a wet sponge to remove excess. Chelsea Evers, Country Living, "Here's How to Paint a Wall, Including all the Materials You'll Need," 12 Dec. 2019 Good360 has been focused on Harvey relief and has donated more than $19 million in supplies to nonprofits, including mattresses, furniture, rebuild materials, caulk and shingles. Tracy Maness, Houston Chronicle, "Houston first graders awed by bike tricks and brand-new bikes," 18 Dec. 2019 This can be done with weatherstripping, door draft stoppers, or window caulk, all of which can be bought for less than $20. London Gibson, Indianapolis Star, "Weatherproofing your home could save you $400 – and save the environment. Here's how to do it.," 30 Nov. 2019 Use caulk, expanding foam sealant or pieces of sheet metal to seal up and close off all holes, cracks and seams found in and around cabinets, floors, walls and windows. Joseph Truini, Popular Mechanics, "How To Get Rid of Cockroaches for Good," 13 Nov. 2019 Look for air leaks around electrical wiring, dryer vents, and pipes, and use caulk or insulation to keep the cold out. Roxanne Washington, cleveland, "To avoid costly catastrophes, prepare your home for winter before the season sets in," 3 Oct. 2019 Ahead of winter, check the fireplace hearth for air leaks and plug them with caulk or expandable foam sealant. NBC News, "How to prep your home for winter (and save money on energy bills and repairs)," 13 Oct. 2018 Check for gaps around air vents, windows, doors and exhaust fans, and apply caulk or weather stripping as needed. Kris Kane, The Mercury News, "10 ways to cut utility bills and conserve energy during the hot summer," 13 Aug. 2019 Replace cracked caulk or sealant around tubs and showers. Washington Post, "Liz Weston: Is your wealth dripping away?," 23 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'caulk.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of caulk


15th century, in the meaning defined above

Noun (1)

1954, in the meaning defined above

History and Etymology for caulk


Middle English caulken, from Anglo-French cauker, calcher, chalcher to trample, from Latin calcare, from calc-, calx heel

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Time Traveler for caulk

Time Traveler

The first known use of caulk was in the 15th century

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Statistics for caulk

Last Updated

24 Nov 2019

Cite this Entry

“Caulk.” The Dictionary, Merriam-Webster Inc., Accessed 19 January 2020.

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More Definitions for caulk


How to pronounce caulk (audio)

English Language Learners Definition of caulk

: to fill the cracks or holes in (something) with a substance that keeps out water


\ ˈkȯk How to pronounce caulk (audio) \
caulked; caulking

Kids Definition of caulk

 (Entry 1 of 2)

: to fill up a crack, seam, or joint so as to make it watertight


variants: also caulking \ ˈkȯ-​kiŋ \

Kids Definition of caulk (Entry 2 of 2)

: material used to fill up a crack, seam, or joint so as to make it watertight

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More from Merriam-Webster on caulk

Rhyming Dictionary: Words that rhyme with caulk

Spanish Central: Translation of caulk

Nglish: Translation of caulk for Spanish Speakers

Comments on caulk

What made you want to look up caulk? Please tell us where you read or heard it (including the quote, if possible).


to insert between existing elements

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