1.Definition: culpably involved
"All those concerned in the bribery case have been identified"
2.Definition: feeling or showing worry or solicitude
"Concerned parents of youthful offenders", "Was concerned about the future", "We feel concerned about accomplishing the task at hand", "Greatly concerned not to disappoint a small child"
3.Definition: involved in or affected by or having a claim to or share in
"A memorandum to those concerned", "An enterprise in which three men are concerned", "Factors concerned in the rise and fall of epidemics"