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
Carpenter bee holes may also be caulked to try and discourage further nesting. Arricca Elin Sansone, Southern Living, 27 July 2025 On Monday, the central bank published a virtual tour of the construction site as further proof, including clips of asbestos caulking removal and blast-resistant window installation. Lily Mae Lazarus, Fortune, 23 July 2025
Noun
Use screens to cover vents and steel wool, expanding foam, or caulk to fill in large gaps. Brandee Gruener, Southern Living, 1 Aug. 2025 Sealing with durable materials such as steel wool, caulk, mesh screening, or rodent-proofing foam can dramatically reduce the likelihood of unwanted visitors. Daniel Fusch, USA Today, 29 July 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 5 Aug. 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

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