chiefduty
nounUK /ˌtʃiːfˈdjuːti/
US /ˌtʃiːfˈduːti/
The most important job a person has to do.
Keeping the children safe is a parent's chiefduty.
RELATED WORDS
OTHER MEANINGS
2. The main task assigned to a worker in a job.
Her chiefduty at the bakery is to bake the bread each morning.
3. The most important thing a machine or tool is made to do.
The chiefduty of a fire extinguisher is to put out small fires.
4. The leading purpose of a group or team.
The chiefduty of the rescue team is to help people in danger.