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
Maggie Horton, People.com, 13 Apr. 2025
Lawrence rattles off a list: hand sanitizer, face masks, face shields, sanitizing spray, disinfecting wipes, rolls of tape to mark out 6-foot increments on the floor, envelope sealers for provisional ballots.
—Lily Hay Newman, WIRED, 15 Sep. 2020
That's why Mayr's first rule is to use a sealer to protect tile floors and sink countertops.
—Brandee Gruener, Southern Living, 20 May 2025
In fact, it's developed both a full standalone S1 toilet and a drop-in sealer kit designed to work with existing Cuddy and Cuddy Lite toilets, so current owners don't miss out on the latest toilet tech.
—New Atlas, 15 May 2025
See All Example Sentences for sealer
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Noun
Snap up these clever food savers that will give groceries a longer shelf life, then keep scrolling to shop a vacuum sealer and more storage containers starting at $14.
—Maggie Horton, People.com, 13 Apr. 2025
Lawrence rattles off a list: hand sanitizer, face masks, face shields, sanitizing spray, disinfecting wipes, rolls of tape to mark out 6-foot increments on the floor, envelope sealers for provisional ballots.
—Lily Hay Newman, WIRED, 15 Sep. 2020
That's why Mayr's first rule is to use a sealer to protect tile floors and sink countertops.
—Brandee Gruener, Southern Living, 20 May 2025
In fact, it's developed both a full standalone S1 toilet and a drop-in sealer kit designed to work with existing Cuddy and Cuddy Lite toilets, so current owners don't miss out on the latest toilet tech.
—New Atlas, 15 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 9 Jun. 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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