a device or substance that is used to join two things together so as to prevent them from coming apart or to prevent anything from passing between them

attach a draught seal to the door itself

a piece of wax, lead, or other material with an individual design stamped into it, attached to a document as a guarantee of authenticity

a thing regarded as a confirmation or guarantee of something

the monarchy is the seal of the unbroached integrity of the Isles

the obligation on a priest not to divulge anything said during confession

I was told under the seal

fasten or close securely

he folded it, sealed the envelope, and walked to the postbox

apply a non-porous coating to (a surface) to make it impervious

the pine boarding should be sealed with polyurethane

fry (food) briefly at a high temperature to prevent it from losing moisture during subsequent cooking

heat the oil and seal the lamb on both sides

conclude, establish, or secure (something) definitively

to seal the deal he offered Thornton a place on the board of the company

fix a piece of wax or lead stamped with a design to (a document) to authenticate it

a fish-eating aquatic mammal with a streamlined body and feet developed as flippers, that returns to land to breed or rest

a member of an elite force within the US Navy, specializing in guerrilla warfare and counter-insurgency

he was a Navy SEAL for eleven years

I had no doubt about the ability of the SEALs to carry out the mission