seal

Noun

• any of numerous marine mammals that come on shore to breed; chiefly of cold regions

• fastener that provides a tight and perfect closure

• a finishing coat applied to exclude moisture

• an indication of approved or superior status

• a stamp affixed to a document (as to attest to its authenticity or to seal it)
  • the warrant bore the sheriff's seal
    

• a member of a Naval Special Warfare unit who is trained for unconventional warfare
  • SEAL is an acronym for Sea Air and Land
    

• the pelt or fur (especially the underfur) of a seal
  • a coat of seal
    

• a device incised to make an impression; used to secure a closing or to authenticate documents

• fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters

Verb

• hunt seals

• cover with varnish

• affix a seal to
  • seal the letter
    

• decide irrevocably
  • sealing dooms
    

• close with or as if with a seal
  • She sealed the letter with hot wax
    

• make tight; secure against leakage
  • seal the windows
    

Related words

• Synonyms: 
  cachet , seal of approval , Navy SEAL , SEAL , sealskin , stamp , sealing wax , varnish , seal off