shield - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “shield”

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shield

noun [C]  us   /ʃild/
a piece of metal or other material, carried to protect the front of the body when being attacked, or a person or thing that provides protection: The police held up their riot shields. The ozone layer is the earth’s shield against radiation from the sun.

shield

verb [T always + adv/prep]  us   /ʃild/
to protect someone or something: When the lights came on, I shielded my eyes with my hands, Mom tried to shield us from the bad news.
(Definition of shield from the Cambridge Academic Content Dictionary © Cambridge University Press)
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