1. 可数名词：椅子
2.主席席位，委员长职位；（会议或委员会的）主席；委员长
3. 可数名词：（大学的）系主任
4.【美】【非正式】=the electric chair
及物动词：
担任（会议、讨论等的）主席；主持（会议、讨论等） 词形变化
- 时态 chaired，chairing，chairs
- 这些名词均有“椅子”或“凳子”之意。
chair通常指带有靠背的椅子，有时也指有靠背有扶手的椅子。
armchair指有扶手的椅子。
bench指可供两人或更多人坐的长凳或石凳，多置于公园或划艇中。
stool多指方的或圆的无靠背无扶手一人坐的凳子。
- act or preside as chair, as of an academic department in a university
- the officer who presides at the meetings of an organization
- an instrument of execution by electrocution; resembles an ordinary seat for one person
- preside over
- the position of professor
- a seat for one person, with a support for the back