Meaning of shield

shield

Pronunciation: (shēld), [key]
— n.
  1. a broad piece of armor, varying widely in form and size, carried apart from the body, usually on the left arm, as a defense against swords, lances, arrows, etc.
  2. a similar device, often of lightweight plastic, used by riot police to protect themselves from rocks and other thrown objects.
  3. something shaped like a shield, variously round, octagonal, triangular, or somewhat heart-shaped.
  4. a person or thing that protects.
  5. a police officer's, detective's, or sheriff 's badge.
  6. a steel screen attached to a gun to protect its crew, mechanism, etc.
  7. a movable framework for protecting a miner from cave-ins, etc.
  8. a covering, usually made of metal, placed around an electric device or circuit in order to reduce the effects of external electric and magnetic fields.
  9. a protective plate or the like on the body of an animal, as a scute, enlarged scale, etc.
  10. See
  11. an escutcheon, esp. one broad at the top and pointed at the bottom, for displaying armorial bearings.
  12. (cap.)the constellation Scutum.
  13. a vast area of ancient crustal rocks which, together with a platform, constitutes a craton.
  14. a protective barrier against nuclear radiation, esp. a lead or concrete structure around a reactor.
—v.t.
  1. to protect (someone or something) with or as if with a shield.
  2. to serve as a protection for.
  3. to hide or conceal; protect by hiding.
  4. to avert; forbid.
—v.i.
  1. to act or serve as a shield.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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