noun
plural chairs
[count] :a seat for one person that has a back and usually four legs
[count] the person who is the leader of a department at a college or university
the person who is the leader of a meeting, organization, committee, or event
the chair US informal :electric chair
verb
chairs; chaired; chairing
[+ obj] :to be in charge of a meeting, organization, committee, or event :to be the chairperson of (something)