Concern may refer to:
Worry, an emotion
Concern (organization) : Student society in Indian Institute of Science, India.
Concern (business), a German type of group company
Concern (computer science), an abstract concept about program behavior
Concern (horse), an American Thoroughbred racehorse
We drove back to the office with some concern on my part at the prospect of so large a case. Sunning himself on the board steps, I saw for the first time Mr. Farquhar Fenelon Cooke. He was dressed out in broad gaiters and bright tweeds, like an English tourist, and his face might have belonged to Dagon, idol of the Philistines.
Appleby [ …] rose from his seat when Morales came in. He shook hands urbanely, unbuckled his sword, and laid his kepi on the table, and then sat down with an expression of concern in his olive face which Appleby fancied was assumed.