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1. Make tight; secure against leakage
   "seal the windows";
   - seal off
    
2. Close with or as if with a seal
   "She sealed the letter with hot wax"
    
3. Decide irrevocably
   "sealing dooms"
    
4. Affix a seal to
   "seal the letter"
    
5. Cover with varnish
   - varnish
    
6. Hunt seals

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

1. (military) a member of a Naval Special Warfare unit who is trained for unconventional warfare
   "SEAL is an acronym for Sea Air and Land";
   - Navy SEAL

Sounds like: sea, sea

Derived forms: seals, sealed, sealing, SEALs

Type of: accolade, affix, award, bluejacket, close, coat, coating, decide, determine, device, fastener, fastening, fill up, fixing, fur, holdfast, honor [US], honour [Brit, Cdn], hunt, hunt down, impression, laurels, make up one's mind, navy man, pelt, pinnatiped, pinniped, pinniped mammal, run, sailor, sailor boy, shut, stamp, stick on, surface, track down

Antonym: unseal

Part of: Naval Special Warfare, NSW

Encyclopedia: Seal, Mark