Definition of “concerned” - Learner’s Dictionary

concerned

adjective uk us /kənˈsɜːnd/
WORRIED

B2 worried:

[ + that ] I am very concerned that class sizes seem to be growing.
People are becoming more concerned about what they eat.
→ Opposite unconcerned
AFFECTED [ never before noun ]

involved in something or affected by it:

A letter will be sent out to everyone concerned.
as far as sb is concerned

B2 used to show what someone thinks about something:

As far as our customers are concerned, price is the main consideration.
as far as sth is concerned

B2 used to tell someone what you are talking about:

As far as college is concerned, everything is fine.

(Definition of “concerned” from the Cambridge Learner's Dictionary © Cambridge University Press)