1 [seel]
an embossed emblem, figure, symbol, word, letter, etc., used as attestation or evidence of authenticity.
a stamp, medallion, ring, etc., engraved with such a device, for impressing paper, wax, lead, or the like: The king took the seal from his finger and applied it to the document.
the impression so obtained: It was unmistakably the royal seal on the document.
a mark or symbol attached to a legal document and imparting a formal character to it, originally wax with an impression.
a piece of wax or similar adhesive substance so attached to an envelope, folded document, etc., that it must be broken when the object is opened, insuring that the contents have not been tampered with or altered.
anything that tightly or completely closes or secures a thing, as closures or fastenings for doors and railroad cars, adhesive stamps and tapes used to secure the flap of an envelope, etc.
something that keeps a thing secret: Her vow was the seal that kept her silent.
a decorative stamp, especially as given to contributors to a charitable fund: a Christmas seal.
a mark, sign, symbol, or the like, serving as visible evidence of something.
anything that serves as assurance, confirmation, or bond: She gave the plan her seal of approval.
a small amount of water held by a trap to exclude foul gases from a sewer or the like.
the depth of the part of the water that actually excludes the gases.
the seals, British. the tokens or signs of public office.
verb (used with object)
to affix a seal to in authorization, testimony, etc.
to assure, confirm, or bind with or as if with a seal: They sealed the bargain with a handshake.
to impress a seal upon as evidence of legal or standard exactness, measure, quality, etc.
to close by any form of fastening that must be broken before access can be gained.
to fasten or close tightly by or as if by a seal: She was sealing envelopes. My lips are sealed.
to decide irrevocably: to seal someone's fate.
to grant under one's seal or authority, as a pardon.
Mormon Church. to make (a marriage or adoption) forever binding; solemnize.
Electricity. to bring (a plug and jack or socket) into locked or fully aligned position.
Verb phrases
seal off,
to close hermetically: to seal off a jar.
to block (an entrance, area, etc.) completely so as to prevent escape or entrance: The police sealed off the area after the bomb threat was received.
set one's seal to, to give one's approval to; authorize; endorse: Both families have set their seal to the marriage.

1175–1225; (noun) Middle English seel, seil(e), seale mark on a document, token < Old French seel (French sceau) < Late Latin *sigellum, Latin sigillum, diminutive of signum sign; replacing Middle English seil, Old English (in)segel seal < Late Latin, as above; (v.) sealen, seilen < Old French seeler, seieler, derivative of seel

sealable, adjective
resealable, adjective

ceiling, sealing. Unabridged


2 [seel]
noun, plural seals, (especially collectively for 1) seal.
any of numerous marine carnivores of the suborder Pinnipedia, including the eared or fur seals, as the sea lion, and the earless or hair seals, as the harbor seal.
the skin of such an animal.
leather made from this skin.
the fur of the fur seal; sealskin.
a fur used as a substitute for sealskin.
a dark, gray brown.
verb (used without object)
to hunt, kill, or capture seals.

before 900; Middle English sele, Old English seolh; cognate with Old Norse selr

seallike, adjective


3 [seel]
verb (used with object) Falconry.
seel ( def 1 ). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
seal1 (siːl)
1.  a device impressed on a piece of wax, moist clay, etc, fixed to a letter, document, etc, as a mark of authentication
2.  a stamp, ring, etc, engraved with a device to form such an impression
3.  a substance, esp wax, so placed over an envelope, document, etc, that it must be broken before the object can be opened or used
4.  any substance or device used to close or fasten tightly
5.  a material, such as putty or cement, that is used to close an opening to prevent the passage of air, water, etc
6.  a small amount of water contained in the trap of a drain to prevent the passage of foul smells
7.  an agent or device for keeping something hidden or secret
8.  anything that gives a pledge or confirmation
9.  a decorative stamp often sold in aid of charity
10.  RC Church Also called: seal of confession the obligation never to reveal anything said by a penitent in confession
11.  set one's seal on, set one's seal to
 a.  to mark with one's sign or seal
 b.  to endorse
12.  to affix a seal to, as proof of authenticity
13.  to stamp with or as if with a seal
14.  to approve or authorize
15.  (sometimes foll by up) to close or secure with or as if with a seal: to seal one's lips; seal up a letter
16.  (foll by off) to enclose (a place) with a fence, wall, etc
17.  to decide irrevocably
18.  Mormon Church to make (a marriage or adoption) perpetually binding
19.  to subject (the outside of meat, etc) to fierce heat so as to retain the juices during cooking
20.  to close tightly so as to render airtight or watertight
21.  to paint (a porous material) with a nonporous coating
22.  (Austral), (NZ) to consolidate (a road surface) with bitumen, tar, etc
[C13 seel, from Old French, from Latin sigillum little figure, from signum a sign]

seal2 (siːl)
1.  eared seal See earless seal any pinniped mammal of the families Otariidae (eared seals) and Phocidae (earless seals) that are aquatic but come on shore to breedRelated: otarid, phocine
2.  any earless seal (family Phocidae), esp the common or harbour seal or the grey seal (Halichoerus grypus)
3.  sealskin
4.  (intr) to hunt for seals
Related: otarid, phocine
[Old English seolh; related to Old Norse selr, Old High German selah, Old Irish selige tortoise]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

"design stamped on wax," c.1230, from O.Fr. seel (Fr. sceau), from V.L. *sigellum (cf. It. suggello, Sp. sello, also O.Fris., M.H.G. sigel, Ger. Siegel), from L. sigillum "small picture, engraved figure, seal," dim. of signum "mark, token" (see sign). An earlier borrowing directly
from L. is represented by O.E. insigel. Sealing-wax is attested from c.1300. Seal point "dark brown marking on a Siamese cat" is recorded from 1934.

"mammal with flippers," O.E. seolh "seal," from P.Gmc. *selkhaz (cf. O.N. selr, Swed. sjöl, M.L.G. sel, M.Du. seel, O.H.G. selah), of unknown origin, perhaps a borrowing from Finnic.

"to fasten with (or as with) a seal," early 13c., from seal (n.1). Meaning "to place a seal on (a document)" is recorded from mid-14c.; sense of "to close up with wax, lead, cement, etc." is attested from 1660s, from the notion of wax seals on envelopes. To seal one's fate
(1810) probably reflects the notion of a seal on an execution warrant.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
seal   (sēl)  Pronunciation Key 
Any of various aquatic carnivorous mammals of the families Phocidae and Otariidae, having a sleek, torpedo-shaped body and limbs that are modified into paddlelike flippers. Seals live chiefly in the Northern Hemisphere and, like walruses, are pinnipeds.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
sea, air, land [team]
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Bible Dictionary

Seal definition

commonly a ring engraved with some device (Gen. 38:18, 25). Jezebel "wrote letters in Ahab's name, and sealed them with his seal" (1 Kings 21:8). Seals are frequently mentioned in Jewish history (Deut. 32:34; Neh. 9:38; 10:1; Esther 3:12; Cant. 8:6; Isa. 8:16; Jer. 22:24; 32:44, etc.). Sealing a document was equivalent to the signature of the owner of the seal. "The use of a signet-ring by the monarch has recently received a remarkable illustration by the discovery of an impression of such a signet on fine clay at Koyunjik, the site of the ancient Nineveh. This seal appears to have been impressed from the bezel of a metallic finger-ring. It is an oval, 2 inches in length by 1 inch wide, and bears the image, name, and titles of the Egyptian king Sabaco" (Rawlinson's Hist. Illus. of the O.T., p. 46). The actual signet-rings of two Egyptian kings (Cheops and Horus) have been discovered. (See SIGNET.) The use of seals is mentioned in the New Testament only in connection with the record of our Lord's burial (Matt. 27:66). The tomb was sealed by the Pharisees and chief priests for the purpose of making sure that the disciples would not come and steal the body away (ver. 63, 64). The mode of doing this was probably by stretching a cord across the stone and sealing it at both ends with sealing-clay. When God is said to have sealed the Redeemer, the meaning is, that he has attested his divine mission (John 6:27). Circumcision is a seal, an attestation of the covenant (Rom. 4:11). Believers are sealed with the Spirit, as God's mark put upon them (Eph. 1:13; 4:30). Converts are by Paul styled the seal of his apostleship, i.e., they are its attestation (1 Cor. 9:2). Seals and sealing are frequently mentioned in the book of Revelation (5:1; 6:1; 7:3; 10:4; 22:10).

Easton's 1897 Bible Dictionary
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Example sentences
It is also possible that hydrostatic sealing has kept the lake truly isolated
  for millions of years.
Dont try to tell me that drillers have perfected the art of sealing holes at or
  near the surface.
Peasants from the nearby countryside manned barricades, sealing off all roads
  to the city.
The wasp leaves the burrow, sealing the opening behind her.
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