The noun seal has 9 senses (first 2 from tagged texts)
1. (3) sealing wax, seal -- (fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters)
2. (1) seal, stamp -- (a device incised to make an impression; used to secure a closing or to authenticate documents)
3. seal, sealskin -- (the pelt or fur (especially the underfur) of a seal; "a coat of seal")
4. Navy SEAL, SEAL -- (a member of a Naval Special Warfare unit who is trained for unconventional warfare; "SEAL is an acronym for Sea Air and Land")
5. seal -- (a stamp affixed to a document (as to attest to its authenticity or to seal it); "the warrant bore the sheriff's seal")
6. cachet, seal, seal of approval -- (an indication of approved or superior status)
7. seal -- (a finishing coat applied to exclude moisture)
8. seal -- (fastener that provides a tight and perfect closure)
9. seal -- (any of numerous marine mammals that come on shore to breed; chiefly of cold regions)
Overview of verb seal
The verb seal has 6 senses (first 3 from tagged texts)
1. (4) seal -- (close with or as if with a seal; "She sealed the letter with hot wax")
2. (3) seal, seal off -- (make tight; secure against leakage; "seal the windows")
3. (2) seal -- (decide irrevocably; "sealing dooms")