1. Be relevant to
   "These issues directly concern our future";
   - refer, pertain, relate, bear on, touch, touch on, have to do with
    
2. Be on the mind of
   "The upcoming exam concerned all the students";
   - interest, occupy, worry
    
3. Involve oneself or intervene
   "Don't concern yourself with my problems"

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
   "She expressed concern for his safety";
   - 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: concerns, concerning, concerned

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

Antonym: unconcern

Encyclopedia: Concern