seal of approval

:  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

:  a fur seal or hair seal as opposed to a sea lion

:  the pelt of a fur seal

:  to hunt seals

:  something that confirms, ratifies, or makes secure :  guarantee, assurance

:  a device with a cut or raised emblem, symbol, or word used especially to certify a signature or authenticate a document

:  a medallion or ring face bearing such a device incised so that it can be impressed on wax or moist clay

:  to confirm or make secure by or as if by a seal

:  to solemnize (something, such as a marriage) for eternity by a Mormon rite

:  to set or affix an authenticating seal to

:  an act or instance of approving something :  approbation