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English definition of “jealous”

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jealous

adjective uk   /ˈdʒel.əs/ us  

jealous adjective (UNHAPPY)

B1 upset and angry because someone that you love seems interested in another person: a jealous husband/wife Anna says she feels jealous every time another woman looks at her boyfriend.B2 unhappy and angry because someone has something that you want: He had always been very jealous of his brother's good looks.
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jealous adjective (CAREFUL)

extremely careful in protecting someone or something: She is very jealous of her independence, and doesn't want to get married. Her parents used to keep a jealous watch over her when she was young.
jealously
adverb uk   /-li/ us  
B2 The exact location of the hotel where the royal couple is staying is a jealously (= carefully) guarded secret. She eyed Gwen's engagement ring jealously.
(Definition of jealous from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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