corefunction
nounUK /ˈkɔː ˈfʌŋkʃən/
US /ˈkɔːr ˈfʌŋkʃən/
The main job that something does.
The corefunction of a heart is to pump blood.
OTHER MEANINGS
2. The most important part of a computer program that makes it work.
The corefunction of the app is to send messages.
3. The basic duty of a person in a job.
A teacher's corefunction is to help students learn.
4. The essential action of a machine.
The corefunction of a washing machine is to clean clothes.