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1a 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. 2something shaped like a shield, in particular. a police officer’s badge. Heraldry a stylized representation of a shield used for displaying a coat of arms. Geology a large rigid area of the earth’s crust, typically of Precambrian rock, that has been unaffected by later orogenic episodes, e.g., the Canadian Shield. 3a person or thing providing protection:a protective coating of grease provides a shield against abrasive dirt a protective plate or screen on machinery or equipment. a device or material that prevents or reduces the emission of light or other radiation. a hard flat or convex part of an animal, especially a shell.
verb [with object]
protect (someone or something) from a danger, risk, or unpleasant experience:he pulled the cap lower to shield his eyes from the glare these people have been completely shielded from economic forces 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. prevent or reduce the escape of sound, light, or other radiation from (something):uranium shutters shield the cobalt radioactive source
, except after c
(as in thief