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
Betsy Cribb Watson, Southern Living, 12 Apr. 2025
Anova Culinary Precision Vacuum Sealer Pro 36% OFF This vacuum sealer has a wet function that activates a low-pressure suction and is a reliable double sealer for effectively sealing juicy foods.
—Bestreviews, Chicago Tribune, 25 Mar. 2025
To increase their longevity, one shopper suggests treating the box with a water sealer.
—Miles Walls, Better Homes & Gardens, 23 Mar. 2025
If so, ditch the clip and opt for an electric heat sealer.
—Cody Godwin, USA TODAY, 11 Mar. 2025
See All Example Sentences for sealer
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Noun
Some materials, like teak, should be treated with oil or teak sealer every few months to preserve their look.
—Betsy Cribb Watson, Southern Living, 12 Apr. 2025
Anova Culinary Precision Vacuum Sealer Pro 36% OFF This vacuum sealer has a wet function that activates a low-pressure suction and is a reliable double sealer for effectively sealing juicy foods.
—Bestreviews, Chicago Tribune, 25 Mar. 2025
To increase their longevity, one shopper suggests treating the box with a water sealer.
—Miles Walls, Better Homes & Gardens, 23 Mar. 2025
If so, ditch the clip and opt for an electric heat sealer.
—Cody Godwin, USA TODAY, 11 Mar. 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 22 Apr. 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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