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English definition of “guardian”

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guardian

noun [C] uk   /ˈɡɑː.di.ən/ us    /ˈɡɑːr-/
a person who has the legal right and responsibility of taking care of someone who cannot take care of himself or herself, such as a child whose parents have died: The child's parents or guardians must give their consent before she has the operation. formal someone who protects something: These three official bodies are the guardians of the nation's countryside. a self-appointed guardian of public morals
(Definition of guardian from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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