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Shield

ʃiːld

Shield definitions
noun
shield shields
  1. a broad piece of metal or another suitable material, held by straps or a handle attached on one side, used as a protection against blows or missiles
    • a sporting trophy shaped like a shield, consisting of an engraved metal plate mounted on a piece of wood

      "team captain Ben Hall collected the winners' shield"

    • a US police officer's badge
    • a stylized representation of a shield used for displaying a coat of arms
  2. a person or thing providing protection

    "a coating of grease provides a shield against abrasive dirt"

    • a protective plate or screen on machinery or equipment

      "a face shield is sometimes an integral part of a safety helmet"

    • a device or material that prevents or reduces the emission of light or other radiation

      "water is a relatively good shield against cosmic rays"

    • a hard flat or convex part of an animal, especially a shell

      "the horseshoe crab's armour forms a huge domed shield"

  3. a large rigid area of the earth's crust, typically of Precambrian rock, which has been unaffected by later orogenic episodes, e.g. the Canadian Shield
verb
shield shielded shielding shields
  1. protect from a danger, risk, or unpleasant experience

    "he pulled the cap lower to shield his eyes from the glare"

    • prevent from being seen

      "the rocks she sat behind shielded her from the lodge"

    • enclose or screen (a piece of machinery) to protect the user

      "cylindrical ducts shield the propellers"

    • prevent or reduce the escape of sound, light, or other radiation from (something)

      "uranium shutters shield the cobalt radioactive source"

  2. remain apart from others for a period of time in order to avoid catching an infectious disease to which one may be particularly vulnerable

    "they are shielding to protect their own health"