What does sealer mean?
A sealer is a device or tool that closes something so that it remains secure, fresh, or protected. The term is especially common for machines used in packaging and food preparation, such as heat sealers, vacuum sealers, and bag sealers. In some occupational contexts, a sealer can also mean a person whose job is to close or secure containers, envelopes, or packages. The word is more specific than the general verbs “seal” and “close”: it normally suggests a practical tool or worker involved in making an opening secure. It is useful in descriptions of manufacturing, kitchens, warehouses, laboratories, and postal or administrative work.
A device or tool used to seal containers, packages, documents, or other materials.
"Place the jar in the vacuum sealer and lower the lid."
Commonly used with a modifier identifying the sealing method or object, such as “heat,” “vacuum,” or “bag.”
A person whose work is to seal or close something.
"The sealer ensured that each carton was properly closed."
Less common than the device sense and dependent on context.
Used for multiple devices or people that seal things.
"The shop owns two heat sealers for packaging its products."
A sealer can turn an ordinary container into one that stays closed, fresh, and protected.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sealer come from?
The word “sealer” was formed in English by adding the agentive suffix “-er” to “seal,” a word inherited from Old English. The suffix is productive in English for naming people and devices that perform an action, as in “printer” or “packer.” The meaning developed naturally from the older sense of closing or fastening something securely.
How sealer is actually used
Usually used with a type of container, package, or material, as in “heat sealer,” “vacuum sealer,” or “can sealer.” When referring to a person, it is relatively uncommon and often context-dependent.