1
: an official who attests or certifies conformity to a standard of correctness
2
a
: a coat (as of size) applied to prevent subsequent coats of paint or varnish from sinking in
b
: a compound applied to grout especially to repel moisture and prevent staining
Cleaned or newly colored grout will stay that way longer, and be easier to clean, if the grout is coated with a sealer.—
Gene Austin
Gene AustinExamples of sealer in a Sentence
Recent Examples on the Web
Bestreviews, Chicago Tribune, 4 July 2025
Economic activity there essentially ended in 1877, when the trade in elephant seal oil was ended and the human population of sealers left the remote islands, which are located en route from Madagascar to Antarctica.
—Brad Lendon, CNN Money, 3 Apr. 2025
Chamber vacuum sealers tend to be more expensive than their external suction vacuum sealer counterparts, but both are effective for packaging and storing solid foods like meat.
—Katie Hill, Outdoor Life, 22 Mar. 2024
Even if your tile is durable enough to handle acids, the cleaner will strip the sealer right off the grout.
—Brandee Gruener, Southern Living, 20 May 2025
See All Example Sentences for sealer
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Noun
These are used most often with external suction sealers and are usually heat-resistant for use with sous vide machines.
—Bestreviews, Chicago Tribune, 4 July 2025
Economic activity there essentially ended in 1877, when the trade in elephant seal oil was ended and the human population of sealers left the remote islands, which are located en route from Madagascar to Antarctica.
—Brad Lendon, CNN Money, 3 Apr. 2025
Chamber vacuum sealers tend to be more expensive than their external suction vacuum sealer counterparts, but both are effective for packaging and storing solid foods like meat.
—Katie Hill, Outdoor Life, 22 Mar. 2024
Even if your tile is durable enough to handle acids, the cleaner will strip the sealer right off the grout.
—Brandee Gruener, Southern Living, 20 May 2025
See All Example Sentences for sealer
Cite this Entry
“Sealer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sealer. Accessed 17 Jul. 2025.
Copy CitationKids Definition
sealer
1 of 2 noun
seal·er
ˈsē-lər 
1
: an official who certifies weights and measures
2
: a substance used on a surface to be painted that prevents the paint from sinking in
sealer
2 of 2 noun
: a person or a ship engaged in hunting seals
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