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    seal
    /siːl/

    noun

    • 1. a device or substance that is used to join two things together so as to prevent them from coming apart or to prevent anything from passing between them: "attach a draught seal to the door itself" Similar sealantsealeradhesive
    • 2. a piece of wax, lead, or other material with an individual design stamped into it, attached to a document as a guarantee of authenticity. Similar emblemsymbolinsigniadevice

    verb

    • 1. fasten or close securely: "he folded it, sealed the envelope, and walked to the postbox" Similar fastensecureshutclose up
    • 2. apply a non-porous coating to (a surface) to make it impervious: "the pine boarding should be sealed with polyurethane"

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  3. to close an entrance or container so that nothing can enter or leave it. Thesaurus: synonyms, antonyms, and examples. to cover a surface with a special liquid to protect it: This floor has just been sealed (with varnish), so don't walk on it!

  4. The meaning of SEAL is any of numerous carnivorous marine mammals (families Phocidae and Otariidae) that live chiefly in cold regions and have limbs modified into webbed flippers adapted primarily to swimming; especially : a fur seal or hair seal as opposed to a sea lion. How to use seal in a sentence.

  5. anything that tightly or completely closes or secures a thing, as closures or fastenings for doors and railroad cars, adhesive stamps and tapes used to secure the flap of an envelope, etc. something that keeps a thing secret: Her vow was the seal that kept her silent.

  6. A seal is a device or a piece of material, for example in a machine, which closes an opening tightly so that air, liquid, or other substances cannot get in or out. Check seals on fridges and freezers regularly.

  7. 1. a. A device or material that is used to close off or fasten an opening or connection, especially to prevent the escape of a liquid or gas: used caulk as a seal around the window. b. An airtight closure: a door that lacks a tight seal.

  8. seal verb [T] (CLOSE) to close a container or opening, or to prevent the escape of a liquid or gas from something: Rubber seals jars tightly. He sealed the envelope and put a stamp on it. [ M ] Broiling with high heat seals in the flavor of the meat.

  9. SEAL meaning: 1 : to close (something) tightly so that air, liquid, etc., cannot get in or out often + up; 2 : to close (an envelope, bag, etc.) by sticking or pressing two of its parts together

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