Definition of "Concern" :
noun: something that interests you because it is important or affects you
"The safety of the ship is the captain's concern."
noun: something or someone that causes anxiety; a source of unhappiness
"New York traffic is a constant concern."
noun: a feeling of sympathy for someone or something
"She felt strong concern for those less fortunate."
noun: an anxious feeling
noun: a commercial or industrial enterprise and the people who constitute it
"A racially integrated business concern."
verb: be relevant to
verb: be on the mind of