verb
preside
prih-ZYDE/prɪˈzaɪd/
To lead or oversee an event, organization, or activity.
She presides over the meeting from the head of the table.

Etymology
The image is of sitting in front of others, hence occupying the position of authority. That developed into directing proceedings, as when someone leads a meeting.
In context
They could call and preside over the plebeian assembly, which was a gathering of common citizens. In this assembly they proposed laws called plebbeites that directly affected the plebeians.
More examples
- The judge presided at the hearing.
- He presides over a committee of volunteers.
- The chair asked another member to preside in her absence.
Forms
preside · presides · presided · presiding