n. 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.n. 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.n. 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.n. 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.n. 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.n. That which authenticates, confirms, or ratifies; confirmation; as surance; pledge.n. A sealed instrument; a writ or warrant given under seal.n. The office of the sealer or official who authenticates by affixing a seal.n. 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.n. Figuratively, that which effectually closes, confines, or secures; that which makes fast.n. 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.n. Eccles.:n. The sign of the cross.n. Baptism.n. Confirmation.n. Same as holy lamb (which see, under lamb).n. In old medicine, the so-called sigil or signature of a plant, mineral, etc. See signature.n. [caps.] Same as Lord Privy Seal.n. In English history, an instrument imposing a forced loan: so called because it was authenticated by the clerk of the privy seal.To set or affix a seal to, as a mark of authenticity, confirmation, or execution: as, to seal a deed.To stamp, as with a seal.SpecificallyTo certify with a stamp or mark; stamp as an evidence of standard exactness, legal size, or merchantable quality: as, to seal weights and measures; to seal leather.To attest; affirm; bear witness to the truth or genuineness of, by some outward act: as, to seal one's loyalty with one's life; hence, to confirm; ratify; establish; fix.To grant authoritatively or under seal.To fasten or secure with a seal, or with some fastening bearing a seal; close or secure with sealing-wax, a wafer, or the like: as, to seal a letter.To shut up or close: as, to seal a book; to seal one's lips or eyes; hence, to establish; determine irrevocably.To mark; designate; appoint.To set apart or give in marriage, according to the system of plural marriages prevalent among the Mormons of Utah.To inclose; confine; imprison.In hydraul., sanitary engin., etc., to secure against a flow or escape of air or gas, as by the use of a dip-pipe in any form.In architecture, to fix, as a piece of wood or iron in a wall, with cement, plaster, or other binding material for staples, hinges, etc.To close the chinks of, as a log house, with plaster, clay, or the like.To aceept; adopt: as, to seal a design.Eccles.:To sign with the cross.To baptize.To confirm.To make the impression of a seal; attach a seal.See seel.n. Sealskin; leather made from the skin of the seal.n. 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.n. See day.