noun. 
                    A marine car nivorous mammal of the order Feræ, suborder Pinnipedia, and family Phocidæ or Otariidæ; any pinniped not a walrus—for example, a hair-seal, a fur-seal, an eared seal, of which there are numerous genera and species.
                  
                
                  
                    noun. 
                    In heraldry, a bearing representing a creature something like a walrus, with a long fish-like body and the head of a carnivorous animal.
                  
                
                  
                    
                    To hunt or catch seals.
                  
                
                  
                    noun. 
                    Sealskin; leather made from the skin of the seal.
                  
                
                  
                    noun. 
                    The amount of lap over the edge of an opening by which a lid or valve projects to make a tight joint and prevent leakage past it.
                  
                
                  
                    noun. 
                    See day.
                  
                
                  
                    noun. 
                    An impressed device, as of a letter, cipher, or figure, in lead, wax, paper, or other soft substance, affixed to a document in connection with or in place of a signature, as a mark of authenticity and confirmation, or for the purpose of fastening up the document in order to conceal the contents.
                  
                
                  
                    noun. 
                    The engraved stone, glass, or metal stamp by which such an impression is made. Seals are sometimes worn as rings, and frequently as pendants from the watch-chain or fob.
                  
                
                  
                    noun. 
                    A small disk of paper, or the like, attached to a document after the signature, and held to represent the seal of wax, which is in this case dispensed with.
                  
                
                  
                    noun. 
                    That which authenticates, confirms, or ratifies; confirmation; as surance; pledge.
                  
                
                  
                    noun. 
                    A sealed instrument; a writ or warrant given under seal.
                  
                
                  
                    noun. 
                    The office of the sealer or official who authenticates by affixing a seal.
                  
                
                  
                    noun. 
                    The wax or wafer with which a folded letter or an envelop is closed; also, any other substance similarly used to assure security or secrecy, as lead for sealing bonded cars, etc. See leaden seal, below.
                  
                
                  
                    noun. 
                    Figuratively, that which effectually closes, confines, or secures; that which makes fast.
                  
                
                  
                    noun. 
                    In plumbing, a small quantity of water left standing in a trap or curve of tubing connected with a drain or sewer in order to prevent the escape of gas from below.
                  
                
                  
                    noun. 
                    Eccles.:
                  
                
                  
                    noun. 
                    The sign of the cross.
                  
                
                  
                    noun. 
                    Baptism.
                  
                
                  
                    noun. 
                    Confirmation.
                  
                
                  
                    noun. 
                    Same as holy lamb (which see, under lamb).
                  
                
                  
                    noun. 
                    In old medicine, the so-called sigil or signature of a plant, mineral, etc. See signature.