caulk

1 of 3

verb

variants or calk
caulked or calked; caulking or calking; caulks or calks

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)
caulker noun

caulk

2 of 3

noun (1)

variants or calk or less commonly caulking or calking
: material used to caulk

caulk

3 of 3

noun (2)

variant spelling of calk entry 2, 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

Examples of caulk in a Sentence

Verb He carefully caulked the area around the windows.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Verb
Install storm shutters and stormproof glass in your windows, and fortify caulking and sealing around the house, including around pipes. Andrea Riquier, USA Today, 3 Oct. 2025 How to Remove Mold from Shower Caulking There are two easy solutions to kick caulking mold to the curb, but, as always, safety comes first. Mary Cornetta, Better Homes & Gardens, 23 Sep. 2025
Noun
Use caulk or insulation to keep cold air out and the heat in. Jalen Williams, Freep.com, 9 Oct. 2025 Use caulk or spray foam to eliminate holes around window and door frames. Arricca Elin Sansone, Southern Living, 24 Sep. 2025 See All Example Sentences for caulk

Word History

Etymology

Verb

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

First Known Use

Verb

15th century, in the meaning defined above

Noun (1)

1954, in the meaning defined above

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

Browse Nearby Words

Cite this Entry

“Caulk.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/caulk. Accessed 10 Oct. 2025.

Kids Definition

caulk

verb
variants or calk
ˈkȯk
: to fill up a crack, seam, or joint so as to make it watertight
caulker noun

More from Merriam-Webster on caulk

Last Updated: - Updated example sentences
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