seal meaning and definition

SEAL noun

Definition of seal (noun)

1. fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters
   • synonyms: sealing wax
2. a device incised to make an impression; used to secure a closing or to authenticate documents
   • synonyms: stamp
3. the pelt or fur (especially the underfur) of a seal
   • "a coat of seal"
   • synonyms: sealskin
4. a member of a Naval Special Warfare unit who is trained for unconventional warfare
   • "SEAL is an acronym for Sea Air and Land"
   • synonyms: Navy SEAL
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. an indication of approved or superior status
   • synonyms: cachet, seal of approval
7. a finishing coat applied to exclude moisture
8. fastener that provides a tight and perfect closure
9. any of numerous marine mammals that come on shore to breed; chiefly of cold regions

SEAL verb

Definition of seal (verb)

1. make tight; secure against leakage
   • "seal the windows"
   • synonyms: seal off
2. close with or as if with a seal
   • "She sealed the letter with hot wax"
   • antonym: unseal
3. decide irrevocably
   • "sealing dooms"
4. affix a seal to
   • "seal the letter"
5. cover with varnish
   • synonyms: varnish
6. hunt seals