1a separate seat for one person, typically with a back and four legs. 2the person in charge of a meeting or of an organization (used as a neutral alternative to chairman or chairwoman):she’s the chair of a research committee the post of a chairperson:he was due to step down after a three-year stint in the chair 3a professorship:he held a chair in physics
chiefly British a metal socket holding a rail in place on a railway sleeper.
1act as chairperson of or preside over (an organization, meeting, or public event):the debate was chaired by the Archbishop of York
2British carry (someone) aloft in a chair or in a sitting position to celebrate a victory: no one seemed anxious to chair him round the hall