noun
Freq #86039
Meanings
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1
noun
a liquid or coating applied to make a surface resistant to air, water, stains, or damage
The builder brushed a clear sealer over the porous stone.
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2
noun
a tool or machine that closes and seals packages, containers, or joints
The operator fed each bag through the heat sealer.
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3
noun
a person or vessel engaged in hunting seals, especially historically
The old sealer returned from the northern waters with a damaged mast.
Thesaurus
Etymology
An English agent noun from seal + -er. The coating, tool, and worker senses derive from the verb seal 'close securely'; the historical hunting sense derives separately from seal, the marine mammal.