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English definition of “concern”

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concern

verb uk   /kənˈsɜːn/ us    /-ˈsɝːn/

concern verb (WORRY)

C1 [T] to cause worry to someone: The state of my father's health concerns us greatly. [+ that] It concerns me that he hasn't been in contact.
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concern verb (INVOLVE)

B2 [T] to be important to someone or to involve someone directly: Matters of pollution and the environment concern us all. What I have to say to Amy doesn't concern you.B2 [T] formal If a story, film, or article concerns a particular subject, person, etc., it is about that person or subject: The movie concerns a woman who goes to China as a missionary.concern yourself to become involved with something, or worried about something: There's no need for you to concern yourself with what happened. Don't concern yourself. She'll be home soon.to whom it may concern something you write at the start of a formal letter or notice when you do not know exactly who it should be sent to
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concern

noun uk   /kənˈsɜːn/ us    /-ˈsɝːn/

concern noun (WORRY)

B2 [C or U] a worried or nervous feeling about something, or something that makes you feel worried: Concern for the safety of the two missing teenagers is growing. There's a lot of public concern about/over dangerous toxins recently found in food. [+ that] My concern is that you're not getting enough work done.
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concern noun (BUSINESS)

[C] a company: a family concern It started slowly, but the company is now a going concern (= doing business effectively).

concern noun (IMPORTANT TO)

B2 [C or U] something that is important to you, or the fact of being important: [+ to infinitive] His concern to appear sophisticated amused everyone. The company's sole concern is to ensure the safety of its employees. There's a matter of some concern that I have to discuss with you. [C or U] something that involves or affects you or is important to you: What were the major concerns of the writers from this period? I don't want to hear about it - it's no concern of mine! "What's happening?" "That's none of/not any of your concern."be of concern to be important: The results of the election are of concern to us all.
(Definition of concern from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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