majorfunction
nounUK /ˈmeɪ.dʒə ˈfʌŋk.ʃən/
US /ˈmeɪ.dʒɚ ˈfʌŋk.ʃən/
The main job that something does.
The major function of a heart is to pump blood.
OTHER MEANINGS
2. The most important part of a machine or system.
The major function of the engine is to make the car move.
3. The biggest event or activity in a program.
The major function of the festival is the parade.
4. A large formal gathering or ceremony.
They attended a major function at the town hall.