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1. Be relevant to
   - refer, pertain, relate, come to, bear on, touch, touch on, have to do with
    
2. Be on the mind of
   - interest, occupy, worry

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, fear
    
3. A feeling of sympathy for someone or something
   "She felt strong concern for those less fortunate"
    
4. Something or someone that causes anxiety; a source of unhappiness
   "New York traffic is a constant concern";
   - worry, headache, vexation
    
5. A commercial or industrial enterprise and the people who constitute it
   "a racially integrated business concern";
   - business, business concern, business organization, business organisation [Brit]

Derived forms: concerned, concerns, concerning

Type of: anxiety, enterprise, fellow feeling, interest, involvement, negative stimulus, sympathy

Antonym: unconcern

Encyclopedia: Concern