n.
     - a separate seat for one person, typically with a back and four legs.
 - the person in charge of a meeting or an organization (used as a neutral alternative to chairman or chairwoman). 
▸the role of a chairperson.
 - a professorship.
 - 
(the chair)
 US short for electric chair.
 - chiefly Brit. a metal socket holding a rail in place on a railway sleeper.
 
v.
  - act as chairperson of.
 - Brit. carry (someone) aloft in a chair or in a sitting position to celebrate a victory.
 
 
  Etymology
  ME: from OFr. chaiere (mod. chaire ‘bishop's throne’, chaise ‘chair’), from L. cathedra ‘seat’, from Gk kathedra; cf. cathedral.