Definition Of seal


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.

blue smoke from the exhaust suggests worn valve seals


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

a member of an elite force within the US Navy specializing in guerrilla warfare and counterinsurgency.

After a military coup in Nigeria, the Seals are sent in to evacuate a small group of foreign nationals, primarily a doctor, from a local mission.

a piece of wax, lead, or other material with an individual design stamped into it, attached to a document to show that it has come from the person who claims to have issued it.

He replied, handing her a letter with a navy blue wax seal .

a thing regarded as a confirmation or guarantee of something.

the International Monetary Fund is likely to give a seal of approval to the Mexican plan

More Definitions

Example Of seal

  • "So when a shark attacks a harbor seal pup, the carcass washes up on shore.

  • seal the finish with a satin varnish

  • A shore visit to the New Zealand fur seal colony was one of the other highlights of the trip.

  • A young seal pup appeared from nowhere, performing an underwater ballet for our benefit.

  • After the final wet dressing, apply emollient to the still moist skin to seal the water in the skin before it evaporates.

  • More Example