majorconcern

noun
UK /ˈmeɪ.dʒə kənˈsɜːn/
US /ˈmeɪ.dʒɚ kənˈsɝːn/

A big worry that people care about a lot.

The safety of the playground is a major concern for parents.


OTHER MEANINGS

2. Something that needs a lot of attention because it is very important.

Clean water is a major concern in the village.

3. A person or thing that makes many people feel uneasy.

The broken bridge became a major concern for the town.

4. The most important thing a group is thinking about.

Keeping students healthy is a major concern for the school.