1 (not before noun) involved in something or affected by it: The affair is greatly regretted by everyone concerned. | Divorce is very painful, especially when children are concerned.(+ in): Everyone concerned in the incident was questioned by the police. (+ with): all the people concerned with children's education2 WORRIED worried about something: Concerned parents approached the school about the problem.(+ about): Ross has never been particularly concerned about what other people think of him. (+ for): Rescuers are concerned for the safety of two men trapped in the mine. | concerned that: He's concerned that he won't get his money back. -see nervous3 as far as I'm concerned spoken used when giving your opinion about something or saying how it affects you, especially when you do not care what other people think: As far as I'm concerned the whole idea is crazy.4 BE IMPORTANT TO (never before noun) believing that something is important(+ with): Congressmen seem to be far more concerned with getting elected than with passing legislation. | be concerned to do sth: We are concerned to sort this out as quickly as possible.5 where/as far as sth is concerned spoken used when saying what particular thing you are talking about: Where money is concerned, I always try to be very careful.6 LOVE/CARE caring about someone and whether they are happy and healthy(+ for/about): How can you expect me not to be concerned about my own son?7 be concerned with if a book, story etc is concerned with a person, subject etc it is about that subject: This story is concerned with a Russian family in the 19th century.- concernedly, adverb
Longman dictionary of contemporary English. 2004.