Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: French
Origin: concerner, from Late Latin concernere 'to mix together', from Latin com- ( COM-) + cernere 'to sift'

concern

2 verb
     
concern2 W3 [transitive]
1 [not in passive] if a story, book, report etc concerns someone or something, it is about them:
This study concerns couples' expectations of marriage.
The report concerns the drug traffic on the Mexican-US border.
2 to make someone feel worried or upset:
Issues like food additives do concern me.
3 [not in passive] if an activity, situation, rule etc concerns you, it affects you or involves you:
The tax changes will concern large corporations rather than small businesses.
4

concern yourself with/about something

formal to become involved in something because you are interested in it or because it worries you:
He told them not to concern themselves about him.
He loved his wife, and concerned himself with her needs and desires.
5

to whom it may concern

TCM an expression written at the beginning of a formal letter when you do not know the name of the person you want to communicate with

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