- A piece of fabric attached to a boat and arranged such that it causes the wind to drive the boat along. The sail may be attached to the boat via a combination of mast, spars and ropes.
- A trip in a boat, especially a sailboat.
- The blade of a windmill
- A tower-like structure found on the dorsal (topside) surface of submarines.
- The floating organ of siphonophores, such as the Portuguese man-of-war.
- To ride in a boat, especially a sailboat.
- To move briskly and gracefully through the air.
- To move briskly.
- (Armor) A broad piece of defensive armor, carried on the arm, formerly in general use in war, for the protection of the body.
- 1599: Knocks go and come; God's vassals drop and die; And sword and shield, In bloody field, Doth win immortal fame. — William Shakespeare, Henry V, Act III, Scene II, line 8.
- 1786: The shields used by our Norman ancestors were the triangular or heater shield, the target or buckler, the roundel or rondache, and the pavais, pavache, or tallevas. — Francis Grose, A Treatise on Ancient Armour and Weapons, page 22.
- Anything which protects or defends; defense; shelter; protection.
- 1592: Go muster men. My counsel is my shield; We must be brief when traitors brave the field. — William Shakespeare, Richard III, Act 4, Scene 3, line 56.
- Figuratively, one who protects or defends.
- 1611: Fear not, Abram: I am thy shield, and thy exceeding great reward. The Holy Bible, King James Version, Genesis 15:1.
- (botany) In lichens, a hardened cup or disk surrounded by a rim and containing the fructification, or asci.
- (heraldry) The escutcheon or field on which are placed the bearings in coats of arms.
- (geology) A large expanse of exposed stable Precambrian rock.
- (mining) (Mining) A framework used to protect workmen in making an adit under ground, and capable of being pushed along as excavation progresses.
- A spot resembling, or having the form of a shield.
- Bespotted as with shields of red and black. Spenser.
- (obsolete) A coin, the old French crown, or écu, having on one side the figure of a shield.
- (scifi) A field of energy which protects or defends.
- (colloquial) A police badge
- The chief put something in his hand and Bosch looked down to see the gold detective's . http://www.michaelconnelly.com/Book_Collection/Closers/ClosersExcerpt/closersexcerpt.html
- (transport) A sign or symbol, usually containing numbers and sometimes letters, identifying a highway route.
- To protect, to defend.
- 2004: w: Chris Wallace (journalist), Chris Wallace, Character: Profiles in Presidential Courage
- :Shots rang out and a 15-year-old boy, shielding a woman from the line of fire, was killed.
- (electricity) to protect from the influence of
- unpleasant viscous oozy sewage ejection
- (obsolete) A loft or upper chamber forming the private accommodation of the head of the household in a medieval hall; a garret room.
- Of or pertaining to the sun; proceeding from the sun; as, the solar system; solar light; solar rays; solar influence.
- (context, astrology, obsolete) Born under the predominant influence of the sun.
- Measured by the progress or revolution of the sun in the ecliptic; as, the solar year.
- Produced by the action of the sun, or peculiarly affected by its influence.
- Energy in the form of electromagnetic radiation emitted from the Sun; but especially that part of this energy that is converted into thermal or electrical energy on Earth
- A boiler that is designed to produce and withstand the pressure of steam.
- Note: The term boiler is, in modern usage, often a misnomer since they are frequently designed to heat water to below boiling point and could be dangerous if they actually produced steam.
- A system of angled and shaped blades arranged on a rotor through which steam is passed to generate rotational energy. Today, normally used in power stations.
- A person who stokes, especially one on a steamship who stokes coal in the boilers
- A device that feeds coal into a furnace etc automatically
- synthesis gas or coal gas