1. (noun)sealing wax, seal fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters
2. (noun)seal, stamp a device incised to make an impression; used to secure a closing or to authenticate documents
3. (noun)seal, sealskin the pelt or fur (especially the underfur) of a seal "a coat of seal"
4. (noun)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. (noun)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. (noun)cachet, seal, seal of approval an indication of approved or superior status
7. (noun)seal a finishing coat applied to exclude moisture
8. (noun)seal fastener that provides a tight and perfect closure
9. (verb)seal any of numerous marine mammals that come on shore to breed; chiefly of cold regions
10. (verb)seal, seal off make tight; secure against leakage "seal the windows"
11. (verb)seal close with or as if with a seal "She sealed the letter with hot wax"
12. (verb)seal decide irrevocably "sealing dooms"
13. (verb)seal affix a seal to "seal the letter"
14. (verb)varnish, seal cover with varnish
15. (verb)seal hunt seals
Definitions of 'SEAL'
Webster 1913 Dictionary
1. (noun)SEAL any aquatic carnivorous mammal of the families Phocidae and Otariidae
2. (noun)SEAL an engraved or inscribed stamp, used for marking an impression in wax or other soft substance, to be attached to a document, or otherwise used by way of authentication or security
3. (noun)SEAL wax, wafer, or other tenacious substance, set to an instrument, and impressed or stamped with a seal; as, to give a deed under hand and seal
4. (noun)SEAL that which seals or fastens; esp., the wax or wafer placed on a letter or other closed paper, etc., to fasten it
5. (noun)SEAL that which confirms, ratifies, or makes stable; that which authenticates; that which secures; assurance
6. (noun)SEAL an arrangement for preventing the entrance or return of gas or air into a pipe, by which the open end of the pipe dips beneath the surface of water or other liquid, or a deep bend or sag in the pipe is filled with the liquid; a draintrap
7. (verb)SEAL to set or affix a seal to; hence, to authenticate; to confirm; to ratify; to establish; as, to seal a deed
8. (verb)SEAL to mark with a stamp, as an evidence of standard exactness, legal size, or merchantable quality; as, to seal weights and measures; to seal silverware
9. (verb)SEAL to fasten with a seal; to attach together with a wafer, wax, or other substance causing adhesion; as, to seal a letter
10. (verb)SEAL hence, to shut close; to keep close; to make fast; to keep secure or secret
11. (verb)SEAL to fix, as a piece of iron in a wall, with cement, plaster, or the like
12. (verb)SEAL to close by means of a seal; as, to seal a drainpipe with water. See 2d Seal, 5
13. (verb)SEAL among the Mormons, to confirm or set apart as a second or additional wife
Definition of SEAL 
