main concern
noun phraseUK /meɪn kənˈsɜːn/
US /meɪn kənˈsɝːn/
The main concern is the most important thing you are worried about.
My main concern is that we finish the project on time.
OTHER MEANINGS
2. The most important thing that needs attention.
Safety is our main concern during the trip.
3. The biggest problem someone is thinking about.
Her main concern was finding a safe place to sleep.
4. The central topic that people care about most.
The main concern at the meeting was the budget.