: to relate to (something or someone) : to be about (something or someone)
: to affect or involve (someone) : to be the business or interest of (someone)
: to make (someone) worried : to cause concern for (someone)
: a feeling of worry usually shared by many people
: something that causes people to worry
: a feeling of being interested in and caring about a person or thing
What made you want to look up concern? Please tell us where you read or heard it (including the quote, if possible).