Meaning of “concern” - Learner’s Dictionary

concern

noun uk us /kənˈsɜːn/
WORRY [ C, U ]

B2 a feeling of worry about something, or the thing that is worrying you:

I have concerns about his health.
IMPORTANT THING [ C, U ]

B2 something that involves or affects you or is important to you:

Our primary concern is safety.
BUSINESS [ C ]

a company or business:

The perfume factory was a family concern.

(Definition of “concern noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)