centraltask

noun
UK /ˈsɛntrəl tɑːsk/
US /ˈsɛntrəl tæsk/

The main job that everything else depends on.

Finishing the report was the central task of her day.


OTHER MEANINGS

2. The most important step in a plan or project.

Getting approval was the central task before building could start.

3. The part of a job that needs the most attention.

For the chef, tasting the sauce is the central task of the evening.

4. The main thing a group works on together.

Cleaning the park was the central task for the volunteers.