1. n. An item of furniture used to sit on or in comprising a seat, legs, back, and sometimes arm rests, for use by one person. Compare stool, couch, sofa, settee, loveseat and bench.
All I need to weather a snowstorm is hot coffee, a warm fire, a good book and a comfortable chair.
2. n. clipping of chairperson
Under the rules of order adopted by the board, the chair may neither make nor second motions.
3. n. (music) The seating position of a particular musician in an orchestra.
My violin teacher used to play first chair with the Boston Pops.
4. n. (rail transport) An iron block used on railways to support the rails and secure them to the sleepers, and similar devices.
5. n. (chemistry) One of two possible conformers of cyclohexane rings (the other being boat), shaped roughly like a chair.
6. n. (slang) (ellipsis of electric chair)
He killed a cop: he's going to get the chair.
The court will show no mercy; if he gets convicted, it's the chair for him.
7. n. A distinguished professorship at a university.
8. n. A vehicle for one person; either a sedan borne upon poles, or a two-wheeled carriage drawn by one horse; a gig.
9. v. To act as chairperson at; to preside over.
Bob will chair tomorrow's meeting.
10. v. To carry in a seated position upon one's shoulders, especially in celebration or victory.
11. v. (transitive, Wales, UK) To award a chair to (a winning poet) at a Welsh eisteddfod.