SEAL

/si:l/
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Definition

  1. Noun:

    • A marine mammal: A carnivorous mammal with flippers that lives partly in the sea and partly on land, especially in cold regions.
    • A device or substance used for fastening or closing: An object or material that closes an opening or container tightly to prevent air or liquid from entering or escaping.
    • An official mark or stamp: A design, emblem, or piece of wax, lead, or paper attached to a document to prove its authenticity or to close it securely.
    • A confirmation or guarantee: Something that serves as a final confirmation or makes something definite.

  2. Verb:

    • To close or fasten securely: To make something airtight or watertight by applying a substance or device.
    • To affix an official mark: To stamp or mark a document with an official seal to authenticate or finalize it.
    • To decide irrevocably: To settle something conclusively.
    • To hunt for seals: To pursue and kill seals, typically for their fur or oil.
Usage Examples

  • Noun:

    • We saw a seal basking on the rocky shore. (We observed a marine mammal resting on the shore.)
    • Check the seal on the jar to make sure it's airtight. (Inspect the closure on the jar.)
    • The document bore the royal seal. (The document had the king's official stamp.)

  • Verb:

    • Please seal the envelope before mailing it. (Please close the envelope securely.)
    • The treaty was signed and sealed by both nations. (The treaty was authenticated with an official mark.)
    • The jury's verdict sealed his fate. (The jury's decision settled his future irrevocably.)
Advanced Usage

  • "to set the seal on something": to make something complete or final; to be the final confirming factor.

    • Winning the championship set the seal on her brilliant career. (Winning the championship was the final achievement confirming her great career.)

  • "my lips are sealed": a phrase meaning one will not reveal a secret.

    • Don't worry, your secret is safe with me—my lips are sealed. (I promise not to tell anyone.)

  • "seal of approval": an official sign that something is good enough or meets a standard.

    • The product has the government's seal of approval. (The product is officially certified as good.)
Variants and Related Words
  • Sealant (n): a substance used for sealing something to make it airtight or watertight.
    • They applied a sealant to the wooden deck.
  • Sealer (n): a person or thing that seals; a protective coating.
    • Apply a coat of sealer to protect the surface.
  • Sealskin (n): the skin or pelt of a seal, used for making garments.
    • A coat made of sealskin is very warm.
Synonyms
  • Noun (marine mammal): pinniped.
  • Noun (fastener): closure, cap, lid.
  • Noun (stamp): emblem, insignia, imprint.
  • Verb (close): shut, fasten, secure.
  • Verb (finalize): conclude, settle, clinch.
Related Phrasal Verbs
  • Seal in: to prevent something (like flavor or moisture) from escaping by closing something tightly.
    • The packaging is designed to seal in freshness. (The packaging keeps the product fresh.)
  • Seal off: to prevent entry to or exit from an area by closing it.
    • The police sealed off the crime scene. (The police blocked access to the area.)
  • Seal up: to close something completely.
    • We need to seal up these boxes for storage. (We need to close these boxes tightly.)
Related Idioms
  • A sealed book: something that is impossible to understand or know about.
    • Quantum physics is a sealed book to me. (I cannot understand quantum physics.)
  • Signed, sealed, and delivered: completely finished and officially taken care of.
    • The contract is signed, sealed, and delivered. (The contract is fully executed and finalized.)
Noun
  1. any of numerous marine mammals that come on shore to breed; chiefly of cold regions
  2. fastener that provides a tight and perfect closure
  3. a finishing coat applied to exclude moisture
  4. an indication of approved or superior status
  5. a stamp affixed to a document (as to attest to its authenticity or to seal it)
    • the warrant bore the sheriff's seal
  6. a member of a Naval Special Warfare unit who is trained for unconventional warfare
    • SEAL is an acronym for Sea Air and Land
  7. the pelt or fur (especially the underfur) of a seal
    • a coat of seal
  8. a device incised to make an impression; used to secure a closing or to authenticate documents
  9. fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters
Verb
  1. hunt seals
  2. cover with varnish
  3. affix a seal to
    • seal the letter
  4. decide irrevocably
    • sealing dooms
  5. close with or as if with a seal
    • She sealed the letter with hot wax
  6. make tight; secure against leakage
    • seal the windows

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