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
Tim Carter, Hartford Courant, 2 Aug. 2025
Regularly applying sealer to your grout and keeping the area clean is your best chance at preventing mold and mildew growth along your grout.
—Ashlyn Needham, Southern Living, 28 June 2025
In addition to the chickens, Frank flushed his shoes down one of the toilets, Dennis and Dee kept blowing fuses with the scheme's need for a power-sucking vacuum sealer, and the basement was choked with carbon monoxide.
—Dennis Perkins, EW.com, 10 July 2025
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
See All Example Sentences for sealer
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Noun
These sealers are used by companies that maintain tennis and pickleball courts.
—Tim Carter, Hartford Courant, 2 Aug. 2025
Regularly applying sealer to your grout and keeping the area clean is your best chance at preventing mold and mildew growth along your grout.
—Ashlyn Needham, Southern Living, 28 June 2025
In addition to the chickens, Frank flushed his shoes down one of the toilets, Dennis and Dee kept blowing fuses with the scheme's need for a power-sucking vacuum sealer, and the basement was choked with carbon monoxide.
—Dennis Perkins, EW.com, 10 July 2025
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
See All Example Sentences for sealer
Cite this Entry
“Sealer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sealer. Accessed 10 Aug. 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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