1.something that interests you because it is important or affects you;
the safety of the ship is the captain's concern
2.an anxious feeling;
care had aged him
3.a commercial or industrial enterprise and the people who constitute it;
he bought his brother's business
4.something or someone that causes anxiety; a source of unhappiness;
New York traffic is a constant concern
5.a feeling of sympathy for someone or something;
She felt strong concern for those less fortunate
1.have to do with or be relevant to;
There were lots of questions referring to her talk
2.be on the mind of;
I worry about the second Germanic consonant