chiefmatter

noun
UK /ˌtʃiːf ˈmætə/
US /ˌtʃiːf ˈmætər/

The chiefmatter is the most important thing to think about.

The chiefmatter at our meeting was how to keep the park clean.


OTHER MEANINGS

2. The biggest problem that needs to be fixed first.

The chiefmatter for the town was the broken bridge.

3. The main topic of a discussion or plan.

Safety was the chiefmatter in their plan for the trip.

4. The most important part of a job or task.

For the firefighter, the chiefmatter is saving people.