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