First Known Use: before 12th century
Dictionary
1seal
noun \ˈsēl\
plural seals also seal
Definition of SEAL
1
: any of numerous carnivorous marine mammals (families Phocidae and Otariidae) that live chiefly in cold regions and have limbs modified into webbed flippers adapted primarily to swimming; especially : a fur seal or hair seal as opposed to a sea lion
2
a : the pelt of a fur seal b : leather made from the skin of a seal
3
: a dark brown
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Origin of SEAL
Middle English sele, from Old English seolh; akin to Old High German selah seal
2seal
intransitive verb
3seal
noun
Definition of SEAL
1
a : something that confirms, ratifies, or makes secure : guarantee, assurance b (1) : a device with a cut or raised emblem, symbol, or word used especially to certify a signature or authenticate a document (2) : a medallion or ring face bearing such a device incised so that it can be impressed on wax or moist clay; also : a piece of wax or a wafer bearing such an impression c : an impression, device, or mark given the effect of a common-law seal by statute law or by American local custom recognized by judicial decision d : a usually ornamental adhesive stamp that may be used to close a letter or package; especially : one given in a fund-raising campaign
2
a : something that secures (as a wax seal on a document) b : a closure that must be broken to be opened and that thus reveals tampering c (1) : a tight and perfect closure (as against the passage of gas or water) (2) : a device to prevent the passage or return of gas or air into a pipe or container
3
: a seal that is a symbol or mark of office
— under seal
: with an authenticating seal affixed
Origin of SEAL
Middle English sele, seel, from Anglo-French seal, sel, from Latin sigillum seal, from diminutive of signum sign, seal — more at sign
First Known Use: 13th century
4seal
transitive verb
Definition of SEAL
1
a : to confirm or make secure by or as if by a seal <seal the deal> b : to solemnize for eternity (as a marriage) by a Mormon rite
2
a : to set or affix an authenticating seal to; also : authenticate, ratify b : to mark with a stamp or seal usually as an evidence of standard exactness, legal size, weight, or capacity, or merchantable quality
3
a : to fasten with or as if with a seal to prevent tampering b : to close or make secure against access, leakage, or passage by a fastening or coating c : to fix in position or close breaks in with a filling (as of plaster)
4
: to determine irrevocably or indisputably <that answer sealed our fate>
First Known Use of SEAL
14th century
SEAL
abbreviation
Definition of SEAL
sea, air, land (team)
SEALS Defined for Kids
1seal
noun \ˈsēl\
Definition of SEAL for Kids
1
: a sea mammal that swims with flippers, lives mostly in cold regions, bears young on land, feeds on fish and other sea animals (as squid), and is sometimes hunted for its fur, hide, or oil
2
: the soft fur of a seal
2seal
noun
Definition of SEAL for Kids
1
: something that closes tightly <The seal on the package is broken.>
2
: the condition of having a tight seal <Caulk gives the window a seal.>
3
: an official mark stamped or pressed on something <She … stamped her own official seal beside his signature. — Lois Lowry, The Giver>
4
: a device with a cut or raised design or figure that can be stamped or pressed into wax or paper
5
: a stamp that may be used to close a letter or package <Christmas seals>
6
: something (as a pledge) that makes safe or secure <The deal was made under seal of secrecy.>
3seal
verb
sealedseal·ing
Definition of SEAL for Kids
1
: to close tightly or completely to prevent anyone or anything from moving in or out
2
: to put an official mark on
— seal·er noun
Medical Dictionary
seal
transitive verb \ˈsēl\
Medical Definition of SEAL
: to apply dental sealant to <the teeth to be sealed are surrounded by cotton rolls and dried thoroughly—J. W. Friedman>
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