(1)   Hard outer covering or case of certain organisms such as arthropods and turtles
(2)   Armor carried on the arm to intercept blows
(3)   A protective covering or structure


(4)   Protect, hide, or conceal from danger or harm
(5)   Hold back a thought or feeling about
"She is harboring a grudge against him"


  1. A broad piece of defensive armor, carried on the arm, formerly in general use in war, for the protection of the body.
  2. Anything which protects or defends; defense; shelter; protection.
  3. 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.
  4. In lichens, a hardened cup or disk surrounded by a rim and containing the fructification, or asci.
  5. The escutcheon or field on which are placed the bearings in coats of arms.
  6. A large expanse of exposed stable Precambrian rock.
  7. A framework used to protect workmen in making an adit under ground, and capable of being pushed along as excavation progresses.
  8. A spot resembling, or having the form of a shield.
    Bespotted as with shields of red and black. Spenser.
  9. A coin, the old French crown, or écu, having on one side the figure of a shield.
  10. A field of energy which protects or defends.
  11. A police badge
  12. A sign or symbol, usually containing numbers and sometimes letters, identifying a highway route.



  1. To protect, to defend.
    • 2004: 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.
  2. to protect from the influence of