noun
a separate seat for one person, typically with a back and four legs
椅子
■(historical)a sedan chair
(史)轿子
■short for chairlift
chairlift 的简称
the person in charge of a meeting or of a commercial or political organization (used as a neutral alternative to chairman or chairwoman)
会议主持人；会长；主席（用作中性词，替代 chairman 或 chairwoman）
the deputy chair of the Supreme Soviet.
最高苏维埃副主席。
■an official position of authority, for example on a board of directors
职位，席位（如董事会席位）
the editorial chair.
编辑职位。
a professorship
教授职位
he held a chair in physics.
他曾是物理学教授。
(the chair)(US). short for electric chair
(美)。 electric chair 的简称
(chiefly Brit.)a metal socket holding a rail in place on a railway sleeper
(主 英)（铁路）轨座
verb
[with obj.]
act as chairperson of or preside over (an organization, meeting, or public event)
担任（组织、会议或公共活动的）主席，主持，监管
(Brit.)carry (someone) aloft in a chair or in a sitting position to celebrate a victory
(英)用椅子（或以坐姿）把（某人）高高抬起（以庆祝胜利）

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常用词组
take the chair
act as chairperson
担任主席；主持

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语源
Middle English: from Old French chaiere (modern chaire 'bishop's throne, etc.', chaise 'chair'), from Latin cathedra 'seat', from Greek kathedra. Compare with cathedral