seal in WordNet English dictionary

1. an indication of approved or superior status
   cachet  seal  seal of approval 
   
2. any of numerous marine mammals that come on shore to breed; chiefly of cold regions
   seal 
   
3. a device incised to make an impression; used to secure a closing or to authenticate documents
   seal  stamp 
   
4. fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters
   sealing wax  seal 
   
5. fastener that provides a tight and perfect closure
   seal 
   
6. a finishing coat applied to exclude moisture
   seal 
   
7. a stamp affixed to a document (as to attest to its authenticity or to seal it)
   "the warrant bore the sheriff's seal"
   seal 
   
8. the pelt or fur (especially the underfur) of a seal
   "a coat of seal"
   seal  sealskin 
   

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